Hate to bring up a dead thread, but after finding out that Pikmin 3, and Mario Kart 8 only render in 720P and upscaled to 1080P, I have every reason to believe none of these games run in native 1080P. Needless to say, I'm not as impressed as I was before and honestly this changes my answer to yes, these games most certainly could be done on current generation platforms.

What you described wouldn't be "easily."

I heard that about Pikmin 3 but not MK8.

wait this thread already here, so ninjablade is still alive? o.o

Wait, so 720p games = PS360 could definitely handle it?

As is, no, I don't think PS360 could handle Mario Kart 8 EXACTLY as it runs now on Wii U. But could you do something to make it run on PS360? Absolutely. 

 Mario Kart doesn't use AA, at all, it renders in 720P at 60FPS with no AA with cartoon-like graphics. I believe the PS3 and Xbox 360 could handle it, to be honest.

As for X, the games art direction is great, and overall it looks amazing, but the lighting looks like absolute shit and it's the one thing I dislke about the art style, and with that in mind I think the PS3 and Xbox 360 could handle it. Bayonetta is the least impressive looking game from the bunch in my opinion, so yeah.

Anyways I'm not saying that the Wii U isn't more powerful, it's just that these particular games aren't showing it. Also, was reading a similair thread to this on GAF where the general consensus was that Mario Kart was upscaled to 1080P and holy shit does it has jaggies. 

Source? (And no, I don't consider neogaf  a legitimate source)

And why would an open-world game like X would purposely leave more than half the Wii U's RAM unused? Cos that's what it would take for it to be doable on PS3/360.

Oh god, why does this terrible thread getting necrobumped?

I believe everyone was going off of the screenshots of it, which were all in 720P and had no AA present whatsoever, same goes for Monolith, of course these games look marvelous in motion, but the still screenshots shows a ton of jaggies and so forth, I was honestly dissapointed by what I saw in the still images.

And ah, as I said earlier in this thread X would need a smaller draw distance in my opinion, there's no denying the RAM advantage the Wii U has, however graphically, the PS3 and Xbox 360's GPU's can replicate the visuals shown at the same technical levels, in my opinion. 

Like I said, the Wii U is more powerful, however these games aren't flexing it's graphical power, but more or less it's larger pool of RAM. 

As far as I'm aware, there haven't been any official direct feed screenshots released of X or Mario Kart 8, weren't they all taken from videos subject to compression and hampered image quality, or non-direct-feed pics?

Even NSMBU had AA, so none for MK8 would be a very strange choice.