I wish they provided enough actual technical details to see what's new here. As far as I'm aware, the usual way to do IP-over-Bluetooth encapsulation is using the Personal Area Networking profile [1], which has required support for IPv6 support since 2001. (I've never tested it on real hardware with anything other than IPv4, so maybe it was specified but never implemented? Regardless, it seems odd that a mechanism that tunnels Ethernet packets would have to care about higher levels of the protocol stack.)
[1]: http://grouper.ieee.org/groups/802/15/Bluetooth/PAN-Profile....