I'd love to see:
An LCD display with animations, themes, more info on-screen
Wattage regulation (like the Darwin)
Adjustable center post
TWO BUTTONS
Integrated shielded USB port for themes, etc. Maybe even charging?
ProVape could even go as far as introduce "suggested power levels" for flavor types, which you can install over the cable.
Ie: Download a profile for "fruity" with a selected wattage range. Of course, this won't appeal to advanced users, but it's neat nonetheless.
Sounds like we might as well dream of the next logical step on this idea...
AN APP STORE!!!
You could download firmware updates that would change the menu system settings available.