Update:

>> I wonder what, if any, involvement IBM has had with the development of the
>> Xbox 720 or PS4 cpus?

> Regarding the PS4 CPU, none I guess.
> http://en.wikipedia.org/wiki/PlayStation_4#Console
> http://en.wikipedia.org/wiki/AMD_Accelerated_Processing_Unit#Jaguar_architecture_.28Kabini_and_Temash.29

Same with the XBox One CPU:

http://en.wikipedia.org/wiki/Xbox_One#Hardware