Here's something to think about.
5 years ago, we didn't need dual core processors. With the way programs are made today, however, we do need them now. Quad Cores are already being utilized by programs and games, and more and more are coming to the market each year.
Do we need 6 core processors right now? No.
Will we need 6 core processors 10 years from now? Probably.
It's called technology advancement. Preparing for the future is never a bad thing. Think of these processors with more of an open mind rather than going "You guys are idiots if you buy one of these things!"