I have a feeling that the NATAL and wand will not grow the market as much as these analysts think they will. most die hard HD gamers have been so anti motion controls, that these games will sit on the fringes of the consoles, much like anything that uses the eyetoy.
we'll see, I could be wrong, but I think a few too many "fair weather companies" are gouing to try and flood it like they did the Wii, and it will blow up in their faces.