Yes Nibius is right, its good for competition, People scream about Intel and AMD, ATI and Nvidia, but in reality its best that we have both, we need both, Imagine how much better Microsoft would be if they had real competition. (well there would be other problems but still). There is a limit to the architecture and manufacturing process with conventional cpus, The transistors or whatever are gonna get so close, that they will eventually just hit the ceiling of what these stacked processors are capable of. I think that quantum computers will work, read -Timeline by Michael Crighton-.