The things I miss in Metro from the classic start menu:
- Easy and single place to shutdown/logoff/reboot: it's not discoverable at all for desktop pc's,
- List of most used apps,
- Direct link to my folders (documents/videos/music/photos),
- Link to config screen
Another problem is that Windows needs a faster development cycle to keep up with changes like iOS did. If we have to wait another 2 full years for new features/changes than Windows on the tablet will not succeed.