So far, they've got the mindshare and a serious head start.
I keep on hearing this, but I really haven't heard of it being in any large projects other than DoubleClick. I don't know if I'd consider being used in a bunch of small hobby projects a 'head start'.
Being used all over the place in the Silicon Forest (Portland/Hillsboro Oregon). Everything from startups to places like Nike and Intel are building out tons of Angular stuff. OSS and .Net shops both using it extensively here.
Not saying that represents the market, but just saying it's taken off in my corner of the world significantly.
there is a lot more, it's being used in a lot of startups and major companies throughout the world today, pretty sure the stats show it is far ahead of ember in real world adoption so far
Databinding is a lock-in feature. Annoying as hell, but true. There's no databinding library that I've seen that does not reduce your ability to use other libraries. I've never seen one that jives at ALL with third-party client templates (like dustjs).
