Have you heard the rumor about iPhones?
They have the capability to link together and process information in the backround of what your doing. Lots of them out there, controlled by the cool Apple overlords...
Ah, I just made that up. 
I'm guessing whatever cost benifits they get from using mass produced consoles will be wasted in cooling/power bills. At least a purpose built supercomputer is efficient; the heat generated by this thing could probably start nuclear fusion!
The real cause of global warming?