I think we're still a few years from the real next generation (ie PS4 and new Xbox).. the new Wii looks interesting but not enough to buy, just like the original Wii imo (I have friends who love it, but the games just don't appeal to me the way Grand Theft Auto and Call of Duty do). Out of the gate the Wii was already almost a generation behind the other consoles so it makes more sense that it's getting an update.. besides that it's mostly just the portables that are seeing new releases
I think the PC keeps creeping up to the mainstream, eventually it'll replace consoles entirely but there's at least one more generation of mainstream console gaming, I think they need to wait a bit to make the technology really count though and the current systems are still pretty adequate.. it'll probably be 2014/15 before most people adopt a new system (give a year after release for a price drop and good titles to start rolling out), I think by then I'll be ready