* Active digitiser pen - like Galaxy Note and several Windows tablets
* Multi-user support. Although I'd be satisfied with just a guest user mode that provided access to all my apps but none of my data.
* More RAM. At least 2GB. Basically whatever it takes to prevent reload problem when switching between safari tabs and between apps.
* SD card reader
* App list/drawer (so I can hide seldom used apps from the home screen but still access them from an alphabetical list)