Thanks for the helpful input, guys.

I was reading up on AngularJS and React, the other day, as I've noticed the latest "trend" of moving away from app stores and into browser based apps, instead.

The thing that got me worried in a way, was the fact that both of these front-end frameworks seem to try and lock you into a technology that is not controlled by open standards. But are corporation attempts (Google and Facebook) to wedge themselves into the programmers' logic.

I don't know your business, but I do know that a lot of users are getting sick of installing a different app to use each site, when the back-end is the same as the web based system. Bootstrap was just an example, I've used it and it doesn't dictate anything relating to the perl/server side of things. If as like you say you are happy with the MVC setup you have in place, you should be well placed to replace the existing front end with one which caters for all clients. The benefits in terms of support an maintainability in terms of one thing vs a website (catering for various browsers/devices) and multiple app platforms is quite clear.