If I'm already using jQuery Mobile -- is http://css-tricks.com/add-page-transitions-css-smoothstate-js/ (http://weblinc.github.io/jquery.smoothState.js/) possible / worth it to implement?
I really don't see a benefit of using jQuery Mobile with smoothState.js. jQuery Mobile already can do everything smoothState.js can, you only need to learn how. Though smoothState.js has everything better described, plus you don't need to use gazillion different page events. But to use them both you would need to turn off jQuery Mobile Ajax handling.
Basically I would like to see smoothState.js approach used inside jQuery Mobile framework.
My advice stick to jQuery mobile if you really need its UI, for everything else use smoothState.js, of course if seamless navigation is something you desire.