Since a few years ago notebooks steadily increased and it looks like in 2007 notebook sales will become stronger than sales of desktop PCs. eWeek writes:
By the end of 2006, the estimated percentage of revenue for companies from desktops will be 47 percent, compared to 41.6 percent for notebooks. For 2007, the numbers will nearly flip, with 45.6 percent of revenue coming from notebooks and 43.1 percent from desktops, according to Farmer's estimates.
Later, in 2008, notebooks will represent nearly 50 percent of revenue, while desktops will produce only about 40 percent of revenue. By comparison, in 2000, Merrill Lynch reported that notebooks only produced about 25 percent of the revenue in the PC market, with desktops accounting for a solid majority of 64 percent.