The desktop will ALWAYS be in Windows.
There is no way Microsoft would allow a huge chunk of their market to disappear. Not all businesses would want to use the Server OS.
I suppose MS may release a 'Home' version in the future without the desktop for people who just want the 'bare bones'...
I've been using Windows 8 for a week or so. Best OS I've used. I mainly use the desktop. No use for 'Metro UI'.
If you want Start button, install Classic Menu. Works a treat. Don't miss Aero transparency either. Just 'eye candy' anyway.
The file system is especially impressive. Really...