Progressive Web Apps are pretty cool, and for good reason: the idea is to take advantage of the advanced features of our web browsers to provide capabilities that rival native apps, while still offering good performance and functionality to users of other browsers.
You might enjoy my presentation, We aim to misbehave - Evergreen: Progressive Web App (yes, that's a Firefly reference), or you might enjoy poking around the code I posted in the corresponding branch. Check out the new pwa examples directory for a README and the core examples.
It's far from perfect at this point, but as a proof of concept, I'm quite pleased, and I think it offers a possible vision of the way forward, particularly for the My Account section of the public catalogue, which really deserves to become its own app. If nothing else, it has refocused attention on enhancing Evergreen's web performance, and that can only be a good thing, right?