That is indeed a possibility, but you can also look at it from another perspective.

Given that Msoft and Sony's consoles will be (a lot) more powerful, and also seeing that developers/publishers don't seem to be able to learn from the past, we will see this gen a repetition of what happened last gen with devs/publishers spending a lot of resources trying to make the best looking game to sell it.

Even with better tools (UE4 seems to go that way), that will mean higher costs. Even with game prices goig up, they will need bigger sales to make that money back. If a port/version of those games for WiiU is a viable option, they may have no option but to launch them on WiiU aswell.

But for that to happen, game development for all platforms must be the same, something that seems likely, and the sales for those games on WiiU must warrant to continue doing it.

Could be the case, I want that ND about the 3rd party lineup like now before i predict about the support going forward. If the game engines are going to be heavily physics and AI driven then the WiiU is prob. going to be left behind.
What will eventually happen though (what i think) is at some point developers are going to have so much horse-power that they will be stumped what to do with it.
Unreal engine 4 sounded adaptable when they unveiled it. Meaning that as long as the GPU is powerfull enough to push polygons you could disable alot of the heavy stuff and still run the same scene.. that is, a game can run on all platforms on a optimized version of the engine with the same assets with no extra work from the developer.
There should be no reason not to release stuff on everything at that point. If that is the case, that WiiU can run that engine, why wouldn't you release the content on that system too?

Well, I'm pretty sure that we'll see ports on the Wii U from the PS720; they question is though, will they be gimped version like those we saw on Wii? Sure, they'll be in HD this time around, but how will it effect the gameplay? I can live with 720/30FPS as long as the gameplay is intact - no worries - but if the actual gameplay is gimped, noone's gonna buy these ports for the Wii U. People will instead buy a PS720, and 3rd parties will eventually catch on to this fact and stop porting over games...

How can the gameplay be gimped? Do you mean AI, physics and nº of objects/enemies on screen?

Personally, I don't expect a huge jump in AI like some believe. It's far too expensive and uses too many resources. It will be better but your team mates will still look dumb sometimes as well as the enemies. I wouldn't worry about it too much.

Physics aren't a selling point. If they were, Nvidia cards with its Physx would dominate over AMD cards without it and both sell well. It's a nice plus but not a deal breaker. Besides even if WiiU's CPU is weaker, it doesn't mean that it won't be able to do it.

Objects/enemies on screen. Well yes, the forest will have less trees which will have less branchs. It may not look as pretty, but it doesn't have to look bad. And if there are less enemies, you can make them harder to kill to compensate.

Yeah, you have good points, I must admit! But I'm still worried PS720 will get superior 3rd party support just because of all the things they'll be able to do, and Wii U can't... I really hope your right; I wanna play most of my games in my couch, not in my chair infront of my PC...

I'm not saying that every game will be ported to WiiU, or even that it will be possible to do it (in 3 or 4 years when developers use the Nextbox/PS4 power to their limit), I'm just saying that this time the ports will be easier and cheaper to do because the architecture will be similar (1 CPU with multiple cores and 1 modern GPU) meaning that if the sales on WiiU are good, devs will continue to bring their games on the platform.

But then again, they have to launch the games on WiiU first to see if they sell or not, something that I fear not every publisher will do (Bethesda, for example). And no, launch ports aren't a good measure for the future sales.

I never saw the 1st party games for GC as awesome... I think Wii had much better games.