For that matter, why would they say PlayStation 3 games are coming to PC instead of PlayStation 3 game videos are coming to PC.
Streaming videos of games are not games.
Are you trolling, or just mentally challenged? It's streaming the game, not just a video of the game. It's no different than playing said game any other way other than the processing is all being done 'in the cloud' with only input and display being handled at the endpoint.