Still watching the Video, if with IP v6 we all have public IP address, doesn't that have a bigger security implications....?
I am getting the IPv6 team to give you an exact answer to this and the UDP hole punching question.
Get help from people you know, to reduce calls to dell/microsoft support, which means (int the long rung) that they don't get as many call's which means they have lower support overheads, will the customers see windows costs reduce?
A lot of those support services are paid for by the person buying the computer through support contracts, but a lot of people opt out, or have no such option, so for those folks this is a great option.
Additionally it does offer smaller computer retailers an option to have better customer support through this feature.
Lastly it offers our support staff those same options to help solve users computer problems.