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Jeff Bezos said the quiet part out loud — hopes that you'll give up your PC to rent one from the cloud
(www.windowscentral.com)
This is a most excellent place for technology news and articles.
Well, if we go absurdly simple you only need to send user input and receive images or something that fairly easily could be rendered as an image (html?).
800dpi mouse sends about 24kbps, keyboard input is negligible. So theoretically speaking, you can do absolutely everything on such a remote PC but with a screen of 240p.
Absolutely miserable.