This is a little work i have done over what the next gen console's will use as CPU's (PS4/XBOX720?/WII2?)
After the failure of Intel and Sony with Larrabee (or so they say) I would put my money on IBM PowerPC A2 16 core processor, who knows? Cell is simply stunning but I doubt they will use the 32 SPU version as its still very difficult to program for.
16 cores for massive multi-tasking.
Low Watt version exists.
Will be Expensive
Low Watt = Underclocked compared to original.
High chance it will use AMD fusion CPU. The xenon isn't what I would call.... great but it gets the job done. no more IBM next time?
Could turn out to be crap.
Could end up being the CELL broadband engine or another last gen PowerPC (this gen right now)