vadimyuryev

$5 says they will implement face-detection emoji's. Tap a button while making a face to instantly drop the emoji into a message.
$10 says there will be an option for the virtual home indicator to be permanently on, thanks to OLED technology. Will be grey in color, so as to not use as much battery life, or customizable. 
Always on clock, or more info (within the status bar) and possibly recent notifications, if you so choose.

gregg thurman said:

If only my poor brain could absorb data as fast as the narrator speaks. Useless demo for that reason.

Sounds like your brain needs some more RAM.