Okay, here we go...

For current (and future) tablet software:
- Next-gen Ngage support
- A more capable built-in web browser
- A usable built-in email client
- A more customizable UI

For future hardware:
- Better camera (at least 5MP)
- GPS antenna
- More responsive touchscreen (multi-touch like the iPhone would be very nice too)
- TV-out and/or VGA-out

Basically, put some of that fancy N95 tech into the next Internet Tablets. That is all.