Disclaimer: " This thread is meant for praising all the coolness of 810, not in any way downplaying 710. Also, no one knows when 810 will go beta so don't use this thread to ask."
Not ranked in order of importance
1. Ability to correctly play .mkv files
2. New text to speech with voices that don't sound like a robot
3. Updated version of MythTV
4. Hardware compatability (video cards, NIC's, soundcards etc)
5. MAME games
6. Simplephone upgrade and Phoenix mic support
7. Bug fix for "Play All" feature under audio
8. Upgraded KDE desktop (and other Kubuntu apps such as firefox etc)
9. Upgraded climate plugin's and zwave drivers
10. Lots of little fixes or upgrades that will make for an overall better experience.
Thats my list, feel free to add on because I know I missed some stuff.