I don't understand why they keep pushing the niche GoPro-style use case, and there's no way it has the battery life to really work for the livestream use case for more than a few minutes. I think the main use case would be people that want to look like they're paying attention in social situations and can't have their heads buried in their phone but still want to check their email and texts. But maybe that's not a sexy enough idea to sell. One thing that's missing from this new site is the eye-gestures that seemed to be part of demos last year. If it's going to be only voiced-controlled that would ruin it for the discreet-email-checking use case.