Yes; a lot of companies that want to make their services available to mobile users (which is a pretty damn large market) but do not have the capacity or do not want to invest in native apps will want their developers to build a mobile webapp, responsive website, or hybrid app.
Disclosure: I'm rebuilding a pretty big BackboneJS app (which I started building two years ago with a team that grew to two dozen people) into an AngularJS-based mobile webapp.
Note also that AngularJS is a whopping 700 KB before minification and gzipping (270 KB minified/gzipped).
yah. I usually first build REST API using HTML as main representation of resources. It looks ugly. But fully functional. Then I add user facing rendering that adds CSS, Javascript, and possibly transforming representation. For mobile pages, I rarely add javascript.