But I thought Nintendo was supposed to release the Wii HD well before that (according to Pachter) ...
Realistically, I think it is safe to assume we won't see a new home console in 2009 or 2010 because one hasn't been announced, there are no (reasonable) rumors about one, and it takes 18 months to ramp-up to the release of a home console (where it is nearly impossible to keep one secret). Beyond that, I think it is possible that we could see the first new console from these manufacturers as early as the middle of 2011, or as late as end of 2012.