Steam has finally entered the cloud gaming arena with Steam Cloud Play. Unlike its competitor's offerings, Steam Cloud Play will only serve as a link between an existing platform and Steam. Developers can register for the service now, but it'll be a while before it is available to the general public.
https://www.notebookcheck.net/Steam-opens-up-registrations-for-Steam-Cloud-Play-but-only-for-developers.466983.0.html