But your desktop is only one of ~1-2% of desktops that use Linux. The "alternate universe", i.e. the 98%+ of the world, are happy with Windows or OSX, some of them by choice. Your clearly a very happy with Linux, but don't project this happiness on others.
The open source world could learn a lot from the story of Firefox. When the market was frustrated with a slow and insecure IE, Firefox came along being very fast and secure. Us geeks loved it, recommended it to non-techie friends and, these benefits were important to them too. What benefit does desktop Linux give me? The only real new benefit coming in Linux is the fast boot up. That is a real consumer benefit. I can't think of another real benefit in the current crop of distros.