Google & Adobe have been collaborating to enable Photoshop to stream to Chrome OS, and it works as well as you’d hope—and probably better. PetaPixel writes,
Essentially, this version would run off of a server, allowing you to use as weak of a machine as you like, since the program isn’t relying at all on your computer’s processing power.
The long and short of it is that, as Ars Technica puts it, “Streaming Photoshop looked like… Photoshop. That’s probably the best praise you can give it.”
That was my experience using it for a bit back at Adobe: surprisingly good.
Another really great web-based alternative is Sumo Paint (sumopaint.com). Has a lot of the same features as Photoshop with a very similar interface. It’s free and you don’t even need an account to use. I love it because you can load a file from a URL and save files to Google Drive.