Who knows? We have no idea what's going in that hardware, if there even will be one this year (which there probably will, but still, no confirmation).
They could still add:
- 802.11n WiFi
- More RAM
- Better CPU,GPU
- Bigger Battery
- Better Camera w/ Flash
- Higher resolution screen
- Physical keyboard
- FM Radio
- Higher quality mic, speakers
Also, we don't know for sure why the iPhone can't record video. Apple have less limitations than even jailbreak software developers. It's possible the hardware can do it, but the underlying software system limits it for some reason (may be limited by performance of software which typically only takes still pictures).