Google is reportedly working on a game streaming service called Yeti that could work on Chromecast, as reported by The Information. While GIbiz notes that rumors of a Google games service existed in the past, there's reason to believe there's something to this. Phil Harrison, former executive for both PlayStation and Xbox, joined Google in January to work on an "extremely special opportunity." Given his background in developing TV-based games, it might be that Google actually is pursuing this.
Of course, if Yeti works on Chromecast, then there's no reason why such a service couldn't work on Android, when paired with a controller. Or, if it ever got past Apple approvals, then it could be on any device.

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This might be indicative of two larger trends. One is the move toward subscription-based billing. Right now, it's extremely popular because of the fact that it's a steady, recurring payment, and users are often not willing to go through the hassle of canceling something that costs a few dollars per month. Or, the value of steady income trumps trying to sell products outright. Someone might be interested in buying a game during the right week, but in a different week, would skip the product. Google jumping straight into providing suscription-based content would help them build out this service, a Netflix-style operation for gaming.
The other trend is that the industry is setting up for a platform-agnostic future. Mi...