A very nice thinking came by me from Rockford Lhotka. It is about future of OS. I quite agree with him. Soon we will have just thin client and everything will be in cloud.

http://www.lhotka.net/weblog/OSEvolution.aspx

Just think how many "cloud" things are you already using? A lot. Today is totally possible to have installed just a browser in you machine, and you can do (almost) everything.