I agreed with Japsander.
To have for example, a game like God of War in a Cloud...you would need a pretty fast internet connection. Not to mention...without falls.
You have the example of Diablo III, that the servers cant handle so many users.
And even if the internet speeds increase, so will the graphics and the amount of data being stream.
And at this point, i can see games evolving much faster than the internet speed...
And many ppl dont like to be logon to the internet, just to play a game (even if its just campaign mode).
I think that are to many factors to be solve in just 10years...("to not sound ridiculous") lol