If this delivers on its promise, couldn't it preserve Flash as a standard for video delivery online?
Cutting bandwidth costs for video websites could be a significant incentive to slow down HTML5 adoption and keep Flash in the game a little while longer.
None of the big players will want tech that doesn't give them enough control over minimum bandwidth/streaming performance.
For small players, putting some h264/ogg files up on Amazon cloudfront may cost some money, but it's extremely easy to set up right and offers extremely good and consistent performance for the money. P2P doesn't add much for distributors that don't get massive amounts of viewers.
Not saying it can't be a game changer somehow; a similar P2P strategy worked out pretty well for Skype. But given that it's all talk right now, I don't think it'll do much to slow down HTML5 adoption for a while.
Cutting bandwidth costs for video websites could be a significant incentive to slow down HTML5 adoption and keep Flash in the game a little while longer.