Well, yeah, I mean, of course you can look at teaser videos for games on systems that haven't even been released yet and know EVERYTHING there is to know about what will come over the entirety of next gen. Makes perfect sense to me.
Anyway, past that, I've never understood the whole desire to go backwards in terms of hardware. Gameplay has ALWAYS been driven by hardware performance. Did you guys really not like Mario Galaxy? Better graphical capabilities increase what is possible from a gameplay perspective. That's always been the case.
Personally, what I'm most looking forward to is the increase in AI depth, seamless environments, more enemies on screen at once, more events happening at once, and more interactive environments. Because that's what developers are saying they are most excited about with new technology to play with. Sorry if that doesn't mesh with anyone's cherished belief that better hardware only makes the "graphix" prettier.
