Sony is looking pretty desperate nowadays with a multi-billion dollar loss in 2008, and more pain on the way for 2009. The PS3 has utterly failed in the market, and there was a lot of talk about whether or not there was going to be a PS4 at all. Sony needed a reliable partner with deep pockets which would actually be there in 2012 to fund this exercise in DRM, and it found one in Intel. Damn good choice really.
The nice Sony engineering lady at CES told us that Intel essentially bought the win, a theoretically good architecture, no imminent threats of going bust, and not being hated by Sony all contributed too. With a couple of deliverables satisfied, the PS4 GPU belongs to Intel. No word if this is going to be the entire architecture, CPU as well, or not. That, from what we are told, is not final yet.
Moving on to the the XBox3 GPU, also due in 2012, we hear strong rumors (but have not confirmed yet) that it is an ATI design. Given the close ties between ATI and MS over DirectX, the bad blood between Nvidia and MS over the grand Nvidia DX10 neutering, plus memories of the XBox1, this is not a surprise either. The bed was made for short-term profits years ago, time to lie in it.
That brings us to the Wii2, also due around the same time. Given that the ArtX / ATI guys have won about every Nintendo GPU since they went 3D, this one appears to be a no-brainer. If you take into account that it will likely be evolutionary, it is almost assuredly an ATI win as well, but we haven't confirmed it either way.