How much time do you all spend setting up and managing the installation for your development environment, each year? Consider updates, installing plugins, fixing problems that arise, switching to a new computer, reinstalling your OS, duplicating your setup on another computer, and anything else of the same vein.
What if you could do it all online (imagine it was fully-featured and usable)? What if all your setup overhead was taken care of, and all you had to do is log into a web site somewhere and code (assuming it was secure)? Would you find that beneficial? Would you go for that?