Before I get started, let me just make a few things clear. Everything I'm about to say is of course, speculation. I'm going off the assumption that the Wii U is indeed using a 4870 GPU and the Xbox 720 (or NextBox) is using a 6670. So I'm not trying to say "awesome look 100% comfirmed OMGZ" or anything like that lol. Again, this is all in-theory.
Also, I know, graphics aren't everything, but really we're all interested in the exact amount of power the Wii U will be packing. So this is just something to think about.
Now Epic recently came out and said that the Samaritan demo can be ran on hardware 10x more powerful than the 360. According to IGN's reports, the NextBox is 6x more powerful than the 360.
As I'm sure most of you have found out, the Wii U GPU, the 4870, is roughly 2x more powerful than the 6670 supposedly being used in the NextBox. In this case, that would mean that GPU-wise, the Wii U is 12x more powerful than the 360.
Memory Bandwidth: 115.2 GB/sec
FLOPS: 1200 GFLOPS
Pixel Fill Rate: 12000 MPixels/sec
Texture Fill Rate: 30000 MTexels/sec
Memory Bandwidth: 64 GB/sec
FLOPS: 768 GFLOPS
Pixel Fill Rate: 6400 MPixels/sec
Texture Fill Rate: 19200 MTexels/sec
So Epic has said that it takes 10 360 to run that demo in native 1080p, and if these rumors are true, the Wii U ends up over-achieving that number being 12x more powerful than the 360.
So in-theory, the Wii U might actually be able the Samaritan demo technology in 1080p. It's just something I realize and it's a pretty fun topic to speculate on. I wanna know what you guys think.
A 4870 would NOT make Wii U 12x more powerful than 360! A 12x jump expectation for WIi U is completely unrealistic! It's even unrealistic for PS4/720.
See that? It takes a GPU with 2.5 TFLOPS to run Samaritan at 1080p 30fps.
We'd be lucky to get such GPUs from even PS4/720 in 2013.
It takes 4.4 times the power of 360 to run Samaritan in 720p and since PS4 & 720 will be no doubt be more powerful than that when they launch in 2013 (expecting 6 -8 x more pwoerful) they can run Samaritan at 720p all effects.
Wii U is expected to be 3 - 5x 360, so either it can run it at 720p reduced effects or sub-hd.
Don't get people's hopes up with false information.