Intel demonstrated today their "single-chip cloud computer" processor that offers an impressive 48 cores. While there are 48 cores on a single chip, this Intel processor only consumes as much power as two standard household light bulbs (this "futuristic" processor is operating between 25 and 125 Watts)...
Except Larrabee is intended to be a GPU, and that silly Cell processor was intended to be a main CPU (even though it shares many characteristics with GPUs).
Yes, and Sony have finally realised that Try searching for IBM, Cell, cancel
So my guess is that the PS4 will have a Larrabee solution, as Sony likes to try out new technologies, and XBox 720 will have an AMD solution, since nVidia is very likely not even interested in working with MS again after the XBox 1, where MS trashed millions of SouthBridges, giving nVidia a loss in one quarter.