Could Android destroy the Windows Desktop monopoly?

Their are many rumors that Google will launch Android-Based computers in addition to chrome OS. Some OEMs have already started. If Android takes off and is cheaper than Windows based computers, and slowly gains software from companies like Adobe, could it destroy Windows on the desktop for the 90 percent of computer users who don't need all of windows? Would you use it? Do you think it would run alot faster than Windows on the same hardware?