What I expect to see in the next firmware updates without going overboard:

- Minor browser tweaks to get more common sites working
- Skype (with integration into address book, etc) usable as a separate application much like Internet Call and E-mail (so that those of you that don't want it won't be forced to have it)
- Another slight improvement to Youtube playback
- Media player sound not skipping while N800 searches for connection/notices dropped connection (returning back to behavior before current latest firmware)
- Less lag in Camera application (and other apps using the webcam)
- Better stability of Nokia Internet Calling (and for it to finally make it's way out of beta)
- Flash tweaked for slightly better performance

What I doubt we will see with the next firmware update

- WMV support
- Opera 9
- Flash 9