The only clear difference between the two in the announcement is that Chrome OS will be designed to run on netbooks and desktop machines, while Android is a mobile operating system that can run on netbooks. I am not a programmer, but what kind of a browser are they going to build that cannot be run by Android on a desktop machine? The biggest part will surely be Google Gears and WebKit. Since the kernel will be Linux and the whole OS open source (if they release it a promised), the whole solution seems highly impractical. Why build two when it is obviously possible to accomplish everything with Android?
