Re: "as fast as the fastest PCs."
@ Steve Todd
Quite right, there have been technical challenges, and Intel's difficulty in moving to a smaller process size has been well reported. My point largely stands though; being 'as fast as the fastest PC' [at some tasks] isn't that high a bar. The amount of money Intel throws at solving their technical issues is determined by the market though, and if gamers are advised that most games don't benefit from anything faster than a Core i5 (since the game engines have evolved with GPUs) then the demand for high end CPUs isn't as high as it might otherwise be.