Performance-wise I don't want to say anything for a year or so when Windows-machines usually start to get bogged down, but feature-wise there are quite a few goodies in there. Here are some of my favorites:
- The new dock-like taskbar.
- The window-management shortcuts (window movement/maximizing), taskbar navigation.
- Notification icon cleanup.
- Environment variable setup. WTF!? Why can I at least get a multiline-control for editing values?
- The Windows console. Resizing? Copy/paste? Tabs? The list of missing features is endless.