A reg keyboard that does not attach and is wireless or you plug into tablet....hopefully not the dorky snap type like the Surface..You can have a hard plastic case with 2 slots to slide in tablet and slide in keyboard...a little bulky but very useful having reg keyboard.......and how about a camera for skype etc.....colors....colors and more colors.........
I read somewhere the keyboard might contain a extended battery.
If they go pro I hope they took a look at AMD's Z60. I’m not saying AMDs processor is better in any way only AMD is claiming better graphic performance over Intel. I sent Nokia a email 6 months back showing what AMD was claiming, Nokia replied that they would check it out.
Countersunk memory card reader or expandable memory slot
I think a great feature would be having a remote desktop app for the tablet. Multiple windows 8 pcs being used on the tablet. Imagine using a high powered program on your pc but remotely controlling it with your tablet. Then minimizing that window and helping an employee fix a setting on their pc at work. Remote desktop is an app on android and IOS but its a little slow and buggy. A seamless remote desktop app could entice IT guys to purchase the tablet.