In theory cloud gaming is a great idea, except for the monthly paying. It would stop people from getting their hands on the game through friends who have already finished it or others who want to sell it. The monthly fee to keep games would be the major killer of it all. If this were to be implemented, in my eyes, it would fail miserably, it would be like Aion compared to World Of Warcraft, it started off well but then everyone realised that World Of Warcraft was better and stopped playing Aion. Probably best example I can think of. Anyway that is my 2c.