I think you're overestimating the WiiU. It just seems more likely that Nintendo will go with a tri-core cpu and a weaker gpu than the 4850. It says the WiiU can
do 720 with 4x AA or 1080 with no AA; which a tri core cpu and a 4770 based gpu can do fine(lets not forget the 32mb eRAM).

However, much like Zarx said, it could be that the Wii U might have a heafty OS and multitasking applications, which is why they are reserving 512mb aside for system/OS. So, the total RAM is anyones guess. Will they go unified pool?

Edit: Also format is important. DDR3 or GDDR5?

Edit 2: Nintendo recently said the price will be a "pleasant surprise". Gives a hint in what to expect.

Even a top of the range AMD CPU (AMD FX 8150) is under $300. Only the top Intel CPUs (i7s) are currently more expensive. Even the best APUs are weaker and cheaper than a top of the range AMD CPU.

Seems like Nvidia is being ditched bad time.

Weren't they ditched at the death of Xbox?

An nvidia card is in PS3 no?

ah yeah you're right. For some reason I thought they went AMD too.

Hey chunky! It's time to update the Xbox720 specs!! http://venturebeat.com/2012/06/16/leaked-microsoft-document-details-299-xbox-720-in-2013-kinect-glasses-onlive-acquisition/

How are those specs really any different than what I already have in the OP?

EDIT: ok there were a couple differences. But not many, just some refinements on GPU and an upgraded to eDRAM. Otherwise, I already had everything else picked. 

That was an interesting leak and I do think it is/was true in 2010. Who knows if they've upgraded since then, but it is pretty much in line with the power/price I was thinking. However, $299 would be at a loss, but who knows how much and probably not for long.

the leak very likely is real,but guess made by a non-engineer

the spec(8x360,$299 price,$225 cost even with Kinect V2,120w) is too wishful,i mean if MS made a console like that i will day 1,but i don't think they would