Of course - you can have a small-footprint OS without the annoyances of other software LOADING. Your OS can start in 5 seconds. You'll rule the world. You can run everything in the cloud nowadays, and on your own personal cloud, too, like
Bibud are trying to do, just more socially. I wouldn't say I needed my audio/video players, my torrent downloaders, my skype, my anything else when that thing is finished. It's just all on a cloud, running wherever you want it to run (not excluding just your own PC). And with the introduction of
WebGL, games are moving to the browser. You don't have to have a cloud, but it's there if you want it.