you guys are funny.
to stir the pot even further - i'd like to make a prediction: Within the next three years, bicycle manufacturers will discover that the 27in wheel is THE IDEAL wheel size. This should roughly correspond to market being saturated by everyone who just bought a 27.5in (650b) wheeled bike, and just barely got their 29er sold (which is a 700mm off road wheel...).
As for me - I'll be sticking with my 26in wheeled bikes and 700C bikes. Should be about 7~10 years from now when 26in will be THE IDEAL wheel size.
(unless, of course, you're after an EXPEDITION bike, then 26in already is THE IDEAL size)