Gartner has more numbers for 2011. It looks like a smartphone is the number one item on consumers wishlists. Combined with the numbers from 2010, this means the numbers of users of Linux on client devices likely doubled in 2010 and will do so again in 2011. More people are buying smartphones than PCs of the notebook, and desktop kinds and the trend will only increase as prices come down. Having seen what a smartphone or tablet can do with a large monitor and keyboard, I believe that the larger format devices will peak this year. Growth of notebook sales has slowed considerably and desktop sales have already peaked.
The world of IT will change dramatically in 2011 and the monopoly is near death.