Mac OS Lion looks promising:
- Choose and organize apps like iOS
- Full screen apps
- Better way to see running apps
- File changes are saved automatically
- File versions are stored and accessible like Time Machine
- Restarting saves the state of running apps and restores them automatically
- Easy file sharing with any Mac on your network
- Server with wiki
These are substantial new features that I would love to have. This is the kind of innovation I admire.