Um I'll go against the flow and say no. 2008 was X360's best year because of the price cut. but Why not 2010? Cause the other 2 giants are actually gonna throw in what they can too to hold back Natal and the probable slim x360.
So, it'll either be close to the best year, or be a little higher than the current best year.
EDIT: Also, the biggest gaming event(E3) is not here yet, and it's sure to hold lots of surprises.
May switch answers from yes to no, and no to yes.