If Nintendo is going anywhere I'd almost prefer they move to PC gaming. Being able to mod the shit out of Zelda and Super Smash would be really cool. Don't think Nintendo will ever allow that though, they're so traditional :C
Well if they left the hardware business, there's nothing saying that they'd only be able to offer games for one other platform. They'd go multi-platform, like SEGA. PC included.
Frankly, the guys over at DigitalFoundry are pros. If they say the Wii U version is the worst, it is. Arguing with them about tech stuff is like arguing with Einstein over general relativity.
It's not like what they're saying doesn't make sense either. The rumors are the Wii U has a weak CPU (not the Power 7 previously rumored, but rather a modified tri-core version of the Wii CPU with out-of-order execution) coupled with an inexpensive but still solid GPU. It makes sense then that the Wii U version would look as good as the 360 version while suffering from CPU related bottlenecks.
Starred. Digital Foundry are pros, and what they say in these comparisons simply is the truth. They are not biased. If you want questionable comparisons, go to TheLensofTruth.com. Digital Foundry have been accused of being biased in favour of the 360 in years gone by, but really that was just butt-hurt PS3 fanboys crying into their milk over missing pixels, worse framerates etc.
But then came the DF articles where the PS3 was declared the winner, and nay-sayers had to shut their mouths. The Wii U version of the game can chug down to the high 20s in terms of frames per second, whereas the lowly PS3 version never gets below 40. They're not bulshitting. Those scenes where in one, 360: 52fps, PS3: 46fps, Wii U: 32fps, or the other one - 360: 46fps, PS3: 42fps, and Wii U: 26fps.. the 360 and PS3 are relatively close to each other, with the 'U version lagging a greater distance behind.
Of course it's not always running at 26fps on Wii U, but it's that great level of variance that's the problem. The campaign on PS3, I can tell you (having finished it on Veteran on that platform) is a pretty smooth game throughout. There's some scenes where you get a feeling that it's not as smooth, but it's still OK. You never get huge drops to 26fps. I mean, Crysis 2 runs in that particular ballpark on PS3. Crysis 2. Compared to that game, computer hardware looks at Call of Duty on laughs.
As Jacob says, the Wii U just has the old Wii CPU tripled-up with one or two new instruction features, and some last-gen AMD Radeon. The GPU is decent, but the whole thing is let down by the weak CPU, which is where the console will always suffer, in the same way that the PS3 always suffered because while it had (at the time) a well above-average CPU, the GPU was weak compared to the 360's.
The difference of course being that the PS3 and 360 were new, competing platforms. Here we have a brand new system which is beaten by 6-7 year old hardware. Even if only in certain areas. Really, if the Wii U was only going to offer last-gen visuals, it could as least perform better than both of the oldies.