If the console makers were putting brand new tech in their consoles, then why wouldn't it already be in powerful PCs today? PCs do have the bonus of being upgradable, and I wish I could have the technical sense (and financial freedom) to do so. However, consoles have proven that the majority of gamers want simplicity. Give them a console that can play games and have fun on.
Consoles are very profitable for most developers due to the big audience of potential buyers. I'm not sold on either the PS4 or Xbox One yet. I'll need to see some fantastic games to buy into it.