I'm always glad to see people experimenting with different approaches to building and deploying apps. That said, the general idea of this Serverfree approach doesn't appeal to me. On any given day, I'll use 4 different devices. I need my data to synchronize seamlessly. I wouldn't use a program (in-browser or traditionally installed application) unless I can synchronize that data either by storing files in a Dropbox-l…
A websocket between all your devices and a server (or even webrtc between devices) could achieve this in parallel.