Will Mobile Operating Systems Replace the Desktop OS?

http://chris.pirillo.com/are-mobile-operating-systems-the-future-for-desktop-computing/ Screenshots coming out of OS X Lion are beginning to show signs that Apple is looking to integrate some of the style and experience of iOS in to its desktop operating system. Computers are beginning to become increasingly touch capable and with that the idea that the kind of operating system we're currently seeing on mobile devices may eventually be heading in the direction of replacing what we currently know as a desktop operating system.

Do you think mobile operating systems will eventually replace the desktop OS?