Wondering whether you have to register your Watch or whether you can just install the updates when your iPhone gets the iOS 9 Beta. I haven't heard of anyone registering their watch for beta updates before.
It's a bit different, you need to download iOS 9 and then install a managed profile to your phone which feeds in the update file.
I'm guessing they're nervous about supplying the actual binaries to people.
I've managed to get the profile but can't get iOS 9 at the moment.
I'm ridiculously excited about standalone apps though. I've been sitting on a tonne of ideas for the better part of 6 months.