How long it takes for the new gamers to adapt depends on how fast Nintendo and other developers push them. Nintendo took it very slow with the Famicom; they were treading unfamiliar waters. This is not the case any more. Consider, for example, Mario Kart Wii. That's a bold bridge to the upmarket for so early in the generation, and a successful one at that. I think we'll reach the status of a new core demographic far sooner this time around...
Sky Render - Sanity is for the weak.