Thanks for the shoutout :) (Paperspace cofounder here) Just to followup a bit - we let you run an full desktop computer in a web browser (we host the machine for you, so its fully managed). This means you can turn a macbook air or chromebook into a powerful machine. If battery is a concern, it might be a great fit.
We are still in a closed beta but shoot me an email dte@paperspace.io if that sounds interesting.