As of now, the update is still expected to include 3D movie capture and playback, the ability to transfer games and other data between 3DS units, and additional features for the Mii Plaza.
Source: Andriasang via VG 247
Nintendo 3DS Firmware Update Delayed
[drop2]Word out of the Nintendo camp this week is that the upcoming firmware update for the 3DS has been delayed by a short bit. The update, originally scheduled to release this week, has been pushed back to December 8th.
monkeyspoon
They seem to be very quiet about the 10 free GBA games we were promised by the end of the year. Are they hoping we have forgotten.
FalconRedux
Damn straight, 10 games are definitely better than additional features for the Mii Plaza :-)