People were saying that about 1GHz a few years ago, though. (Although 1 THz is admittedly far less feasible, as I think that would require getting to the nanotechnology/superconductor stage).
Older games didn't use the system timer to limit the speed that they played at. At that stage, it was thought to be unneccessary, but it does render them unplayable now because they perform instructions as fast as they possibly can.
Since this thread is active again, I've found a program that enables you to change the speed of running programs. You can tune it to the speed of whatever game you're playing so that no game runs too fast.
I couldn't even scroll a 320x240 klik game on my old 200mhz without it slowing to a halt. 35mhz is just suicidal
"Say you're hanging from a huge cliff at the top of mt. everest and a guy comes along and says he'll save you, and proceeds to throw religious pamphlets at you while simultaniously giving a sermon." - Dustin G