A Google exec recently said , "In three years' time, desktops will be irrelevant." That's debatable, but there's no question that mobile use will have grown much more than it already has. Based on comments in a recent keynote , Microsoft CEO Steve Ballmer doesn't seem to think PC use is going to drop too much, but he did say, "Mobile queries are just going to keep going up and up and up." Do you think desktops will be irrelevant in 3 years? Share your thoughts here .