Two more things
11: Everything runs pretty much everywhere. You are not tied to any particular distro, nor support provider. That means more competition, lower prices and higher quality.
12: Everything is pretty much eternal. If Canonical pulls the plug on Kubuntu, no problem. You can always switch to OpenSuse. If you absolutely, positively can't live without Kubuntu (or any other piece of Linux software, for that matter), you can download sources, and maintain it yourself.
> Bright future
A couple of reasons why the bright Linux future is always just around the corner, and never quite here yet.
1: DirectX. Let's face it- DirectX looks far better than OpenGL, and most of the games run under it. That means most of the people will have Windows at home, and will consequently prefer Windows at work.
2. OpenOffice/LibreOffice. No further explanation is necessary, I guess.
3. LINQ to SQL. Microsoft considers this strategic technology for a reason. There are a couple of ultra fancy open source development tools (Qt Creator, Netbeans, ...) that could almost compete with Visual Studio, but none of them incorporates any kind of object-relational mapper. As a matter of fact, LINQ to SQL is light years ahead of any open source ORM I came across so far. And that means, that Microsoft will continue to dominate the world of the big business core applications.
