That's me understanding as well. NG and React are the top players and VueJS and EmberJS are niche. On stackoverflow jobs looks like around the end of 2017 Vue jobs > Ember jobs.
http://reallyhyped.com/?keywords=vue.js%2Cember.js
Taking it a step further it seems to be broken down:
Enteprise - Angular
Startups and Larger Agencies - React
Smaller Agencies - Vue
Angular is dominant because large Enterprises are slow to adopt and Angular is really great because it works so well and everything is packaged out of the box.
React is still new compared to Angular which is why Startups are adopting it. Kind of like how Rails was popular with the Startups a few years ago.
Vue is universally loved by Developers but is not backed by the big companies in the States (it's bigger in China apparently?). It's considered Indie in North America so it's relegated to low budget projects.