The thing is that not supporting the Wii just raises costs. So even if the audience moved to the HD systems, there aren't enough to make the developers money.
And again, it's hard to tell if the crowd has moved on when most of the games the crowd would buy are not there, and the few that do are given almost not marketing (Call of Duty).
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs