Many concepts for Windows 8 themes have been created so far. There are two white concepts for a Windows 8 theme that look very promising! What would you like to see in Windows 8, a white or a dark desktop theme or both? Poll inside.
White is definitely a trendy colour and stands for luxury. Many people also like a darker desktop (which also saves a lot of energy by the way, in contrary to a white desktop).
This is a great concept for a white Windows 8 theme:
Windows 8 Theme Concept 1
Windows 8 Theme Concept 2
There are plenty of great Windows 8 themes available for download:
Windows 8 themes for XP, Vista and Windows 7.