We are having the same discussions, and a lot of the developers seem to lean towards angular, simply because of that momentum that you mentioned.

> "The project I'm working on at Netflix is extremely ambitious, ... solving pretty interesting problems in Ember, that are actually a lot more complicated than problems I solved in previous Angular projects"

This is a key point that I keep running into. It seems that more complicated applications can benefit from Ember's very opinionated nature and more backbone-like structure...

I could be totally off base, as I've not created a large-scale app in either of these frameworks (yet).