Yes it is, but GTA V alone is huge money maker, game is still constantly one best selling game, and become best selling game of all time. Probably would sell few millions even on Switch.

If they're willing to port LA Noire, a significantly less popular title, why not a port of GTAV?

Seems like an obvious thing to do even if they settle with the 7th gen version.

You spout some nonsense on this thread but 3-4x compared to PS3/Xbox 360 is pure crap. Switch has actually less memory bandwidth than 360 and PS3 and yet  somehow 3-4x more powerful. 6-8x memory yes, cpu likely a bit weaker than 360, definitely weaker than PS3, GPU docked at 50% to 80% over ps3/360 in performance plus an enhanced feature set.  Still I'm happy to be wrong but realistically does anyone honestly think this is true considering it's current performance level. We are seeing hugely downgraded ports of PS4 and Xbone games not dissimilar I'm sure to what would have been achieved on 360 and PS3 if the same games were ported to them. Yes I'm sure the Switch is going to be a bit better in docked performance mostly due to additional memory. 

As always people need to look at the reality of what the Switch is achieving and not accept ridiculous statements like the above. Wait for the release code of games and see how they compare to last gen versions both portable and docked. Portable may struggle to match them in some ways and docked will perform above but 3-4x more powerful is a huge difference that is not supported by the known specification especially with limited storage and having to offer good battery runtime.  Lets see what graphic assets the Switch will be using for LA Noire we may see a port with more similarities to 360 and PS3 rather than high end PC of the time which is likely where the PS4 and Xbone will be. 

As we get more ports of games that existed previously on ps3 and 360 we will have a better understanding of where the Switch sits but we should always base such comparisons on retail code and hardware.

Seems good enough

Seems good enough

No its not pure crap, less memory bandwith doesnt change nothing. Again, 6-8x more RAM memory on side (because difference with amount of memory does not change with newer tech/architecture ), your hole comparison is wrong because you comparing only numbers on paper of tech/architecture (CPU/GPU) thats apart for hole 10 years (do you realise about how many generations were relased betwin), so you comparison is clear nonsense. Offcourse that 10 years newer tech/architecture is newer, better and far more efficient than tech/architecture from 10 years ago in any case.

Switch is just launched and we still yet to see in coming years for whats Switch is really capable (we still talk only about 1st year Switch games), of course that devs and games still dont use most of Switch hardware, but only fact that Switch is running at 1080p and at more stable FPS games that were 720p on PS3/Xbox360 tells us that Switch is much more capable right from start. La Noire is just another example, and we talk about last gen port not new gen game that could use modern features and effects of Switch hardware compared to PS3/Xbox360, if you think that's just because more RAM memory your lying yourself. Storage and battery life doesn't have anything with Switch strength and capabilities of hardware, La Noire is 1080p despite those things.

Apples to apples are generally the most helpful, yes, assuming the game in question is a good conversion on all of the systems being compared. (Bayonetta for instance isn't a good example of PS3's capabilities relative to 360)

Still I would say some conclusions can be drawn even from apples to oranges; for example, Switch launch title Fast RMX runs at 900p-1080p/60fps while using PS4/Xbone tier rendering techniques, even if it's not a game shared with PS3/360 it demonstrates a level of technical prowess those systems can't match.