I was told by Chuck Westfall (the REAL one) that the reason GPS or WiFi was not integrated into the 1Dx is due to the fact it's a 100% Magnesium body, where as the 6D has a plastic top, where they can put the necessary GPS Receivers or Wifi Antenna. However, I think this is complete BS, they could had added it to the 1Dx and just used the GPS/Wireless port to add an optional antenna when you wanted to use those features.
Also, I suggested that there be some way to playback image annotations, maybe holding down the annotation/lock button for x seconds will start playback. It's a pain in the a$$ to have record/lock with no quick way to change to playback. On that note, also allow us to select another button to assign rating to other than voice annotation/lock button.