Yeah I got the news an hour ago. That's amazing, very happy about it! Been working on a webgl pet project and concerned about adoption with the iDevice market out of reach.
iOS has definitely been a sore point for selling WebGL solution until now because the only option was doing it as an app, so that was limiting 3D
It might still need some tweaks here and there but I'm already amazed this demo for a customer of mine from January works as-is (except I need to tweak the background shader, it was a quick test anyway), in the browser without plugin or app on an old iPad 2: https://twitter.com/wildpeaks/status/473672792689639424