Notice that it's showing the "pairing" swarm code, meaning it's not initialized. Dude is wearing it just to show off the watch. :-)

Dude is wearing it because Apple paid him a sizeable amount to wear it, I reckon. ;)

I don't believe Apple would do such a thing. Whenever you see Apple products in movies and elsewhere, those aren't product placements.

Of course Apple would never do such a thing. They're an R&D company first and foremost.