a most excellent article! There are a couple of interesting differences here from previous Gopros -- which have implications for those wanting to mod Gopro 3s -- with wider circular fisheye lenses etc
Here the M12 lens barrel mount looks different from before and maybe not so easy to remove the lens. And now the whole camera sensor is on a special removeable board. So maybe the only difference between the different models of Hero3s is that sensor board. Another implication is that if you could find an extender for that connecting cable you could make a very small remote camera head for micro panoramas etc with very high quality.
Ragecam are offering mods of Hero3s eg. http://www.youtube.com/watch?v=72t7XHvP5DE
and they mention the need for a special ring mod. "the hero2 and hero3 need a special ring installed on them by us to work correctly.
the hero3 mod is very difficult and should only be preformed by professionals. We offer the service if needed to achieve this modification correctly."
One thing that makes the Hero3 more interesting for panoramas I think is that they are 30% thinner than before. So you could mount two back to back (with circular fisheye lenses) with less parallax than before -- so you could have a 360 video solution (if the sync could be worked out) that could be used in more closeup situations than anything hitherto.