A nice little interview with Paul E. McKenney, Distinguished Engineer, IBM Linux Technology Center.
http://www-128.ibm.com/developerworks/power/library/pa-nl14-directions.html
and a bit of info about Xbox 360 PowerPC CPU
http://www-128.ibm.com/developerworks/power/library/pa-nl14-directions.html
and a bit of info about Xbox 360 PowerPC CPU
Of course, compare that to our PowerPC processor for Xbox which does 700 times as many floating-point operations per second as the four-core ARM does integer operations per second. It has only three cores instead of four, but it does use quite a bit more power. Still, 85 watts is well within range for a consumer device and not that long ago you couldn't buy a supercomputer that could do what PowerPC can now do, regardless of how much power you had available.