While the Year of the Linux Desktop may forever be a joke, 2010 is the Year of Linux on the Small Computer you Carry With You Everywhere.
Back to the days when you had no idea what you were downloading installing when you grabbed a free utility off the 'net, and had no legal way of finding out.
If that were the case then we already got the Year of Unix on the desktop and the Year of Unix on the smartphone. Yep, I am talking of OS X. Funnily enough Linux people (and others) laughed at the idea that OS X is Unix... it was too far from it.
I think we can agree that Android is not really Linux, at least not what we mean colloquially for it. So no, it won't be the year of the Linux.
But yes it will be the year of FOSS on your mobile. That, I think, is the big novelty. :)