It wouldn't be an easy port, GTA V on ps3 and 360 was right at the end of their life when just about ever ounce of performance was extracted from those consoles. Both have significantly more memory bandwidth and cpu resources even if they have more limited memory and older gpu architectures. I think we are much more likely to get a compilation of ps2 era GTA games on a compilation cartridge than GTA V though.

Switch can run anything on a PS3/360 without much fuss. It can run Zelda: BoTW at 900p and Mario Kart 8 at full 1080P/60 FPS which I doubt either the PS3/360 could do, PS3/360 can't even run Call of Duty at full 720p. Skyrim is also coming to Switch, how much more "demanding" is GTAV really. 

The GPU is far more modern, far more powerful, and has waaaaay more RAM. 

Rockstar can take their PS2 GTA games and shove them up their ass if that's their line of thinking. 

A compilation of GTA 3, Vice City, San Andreas, Liberty City Stories and Vice City Stories for Switch would be perfect... hundreds of hours fun guaranteed. (They could even include GTA 1, GTA 2 + London DLCs and Chinatown Wars for completition).

I'd buy such a compilation instantly although I have bought most of these games already at least twice and could theoretically play most of them on the go (Android versions on my Xperia phone with a strapped-on DualShock 4).

It would be great for Nintendo and Rockstar also, but unfortunately I think Rockstar doesn't care too much about another version of game and that they are very pleased with current sales, but maybe point that they could have full GTA game in portable mode could change their mind.

Is this serious post!? Switch has much more raw power (not to mention architecture and tech gain) compared to PS3/Xbox360 that it could run any PS3/Xbox360 game at 1080p with better frame rate. Fact that Switch runs MK8D at 1080p/60fps proves that, same like few comparisons of multi platform games between Switch and PS4 versions. Switch power is somewhere between Wii U and XB1, and even Wii U is more stronger than PS3/Xbox360.

I totally disagree but time will tell who is right. You have to try and work out what a game requires in resources and then look at the strength and weaknesses of the console in question.  Zelda and Mario kart work on the wii u which has very low cpu resources, call of duty struggled horribly on wii u compared to ps3 and 360. Unfortunately its highly unlikely we will see GTA V on Switch but Skyrim will be a good indicator of how the Switch compares to the older gen consoles. Hopefully with the ease of development on Switch we won't have any excuses about being a poor port and it should just be what it is, good or bad an indicator of the Switch performance level for more ambitious open world games that require fairly high cpu resources. Well fairly high cpu resources for 2005-7 games consoles and portable consoles of today. I'm geniunely interested myself to see how much the later gpu architecture feature set can be leveraged to compenate for the low performance level of the Switch hardware. The tile based rendering should assist a fair amount in reducing the gpu workload and maximising the efficiency of the limited memory bandwidth but until we actually see a Switch game that attempts a realistic game world with weather patterns, physics engine etc we cannot know for sure what can be achieved. Looking at the much more powerful Nvidia shield tv box though indications are fairly poor.

Of course its a serious post and you are completely wrong on your technical analysis, the reality is clear based on the evidence of many wii u games which struggled compared to 360 and ps3. Just go to digital foundry and look at their faceoff comparison's between wii u and 360/ps3 about 2/3rds show the wii u as weaker. The Switch still doesn't have as much cpu resources as xbox 360 let alone ps3. Lets not confuse simplistic cartoon graphics with repeated textures with games that require a high performance hardware. Zelda windwaker ran on a console with a 8 gflops gpu and still looks great today. Look at other gamecube games trying to do realistic graphics like medal of honour or call of duty and it looks pretty hopeless compared to today's graphics. I really wish people wouldn't use simplistic cartoon graphics to try an up the performance level of Nintendo hardware. It just brings the debate down to the farce level. Look at how the wii u performed running the same games as 360 and ps3 to get a fair comparison. We will obviously never know how the ps3 or 360 would run mario kart or how the wii u would have run uncharted but there are plenty of multi-format games for comparison.

Where is your evidence for wii u is much stronger than ps3/360? The spec's show many shortcomings with wii u and the real world proof also shows the wii u as weaker. What exactly is your evidence, some farcical imaginary comparison of cartoon graphics? Surely now the wii u is end of life we don't have to pretend anymore there is some magical future games that will finally show the wii u to be stronger.

Going to be a reality the moment that streaming app launches for switch.

Of Course they struggled Wii U multi platform games struggled when when devs were doing 7 years games for PS3/Xbox360 while Wii U was brand new console they didnt know (look PS3/Xbox360 games at launch). But again you had some 3rd party games on Wii U that were better than they were on PS3/Xbox360. Also Wii U architecture was very different compared to PS3/Xbox360, PS3/Xbox360 had strong CPUs (especially PS3) but they had week GPU and they had very small amount of RAM, while Wii U had weaker CPU but stronger and more capable GPU and much more RAM, and multi platform devs ofcourse didn't had enuf time to make most of Wii U hardware like they did with PS3/Xbox360 because they left platform in 1st year.

Switch has stronger and much more capable CPU than Xbox360, PS3 CPU is totally different story because it was crazy strong, PS3 CPU is stronger even compared to PS4 CPU if you comparing core with core in single in some operations, but Switch CPU is much more better for modern games that are using much more effectively multi core CPUs than PS3s CPU. And thats only about CPU, Switch GPU is few times more capable and stronger, you have 6x more usable RAM, and not to mention architecture and tech gains. Reality is that even in portable mode Switch is stronger and more capable than Wii U not to mention PS3/Xbox360, thats why Switch even in portable mode is runing Zelda BotW better than Wii U, thats why MK8D is runing at 1080p/60fps on Switch compared to 720p on Wii U, you need around 2.5x stronger hardware to run 720p game at 1080p resolution.

This is very good summary

http://www.neogaf.com/forum/showpost.php?p=237990345&postcount=51

Eww, gta 5 was not a very good game. Still, if it happens, I'm sure many would buy it.

It honestly makes sense simply because it's gta5. Even if it's a cheap dirty port of the 360 version gta5 portable edition would probably make a lot of money