I was really curious how they'd handle wireless audio. In my experience, Bluetooth is slow to pair, connect, and glitchy in common environments. So I find it very indicative that the new Airpods do not mention Bluetooth, and the Beats Solo3 cryptically mentions "Connections: Bluetooth, Wireless" on its product page [1]. Sadly, I don't expect them to open their tech to 3rd parties soon :(
From the video, I got the impression they're using their own custom radio solution, that allows them to more easily pair. We don't know much about the reliability of the new mechanism, however.
It's also compatible with old iPhones going back to the 5, so it can't be anything too custom. My bet is it's Bluetooth but a custom profile and custom pairing.
[1] http://www.apple.com/shop/product/MNEN2LL/A/beats-solo3-wire...