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As some may know me and a few others debated in great detail about the future of streaming games, specifically Sonys acquisition of Gaiki (A company similar to Onlive).
In any case it turns out Sony did purchase Gaiki for streaming games. It looks like it will not only be a big part of the PS4 but they are also looking to add the service to PS3 and Vita.
Microsft has also been looking into streaming games but have yet to leak or state anything concrete so we will see but again I see them also embracing streaming games.