If you want to look at it by comparison to the iphone led smartphone revolution, the timeframe there was:

first iphone release: 1/2007

first android phone: 10/2008

first touchscreen BB: 11/2008

first webos phone: 6/2009

(all dates courtesy of the wikipedia articles for the specific phones or OSes)

and then you didn't really get a phone which competed well with the iphone until, arguably, the nexus one which was in 2010 (or even the Pre which was middle of '09) making it a full 2.5 - 3 years later.

The point is that this stuff progresses in fits and spurts over a long period of time and that the next six months are going to be no more significant than the six which follow it, contrary to what HP's and Motorola's marketing people tell you today (or Apple's will in a few weeks time).