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That's my thinking too. That would be pretty cool. Or maybe a way for future developers to plug it right into the computer. It would seem to affect waterproofing, though, since it doesn't look like(?) there's an O-ring around it.

The black raised part in an oval around the dots (all of them, not individually) IS the O-Ring. ;)
 
Ding! Ding! Ding! Ding!

I'm hoping for a way to connect it to my magneto-optical drive.

laser discs all the way!
laserdisk.jpg
 
It could also be a lightening connector, minus the power and GND pins (assuming the casing could be used as GND).

Would be interesting to see if we can get anything from it.
 
Port cover was a difficult bit to remove in the ifixit teardown. They had to push is out from the inside. They did say they thought Apple might have a special tool for this, but they couldn't get it out themselves from the outside.

The idea of smart bands with battery and sensors seems quite credible. Who knows what other things Apple has up it's sleeve (pun intended, literally).
 
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