I also believe there are some problems currently, not everyone will be able to use it.
But this is the future for sure. It is way more easy for gamers, they can even play on their TV. And it can be much more rewarding for developers. And I really like the idea to stop piracy.

The opposite direction of this will be mobile gaming and has a good chance to survive. Games for iPhone are a good choice for the future as an example.

But home entertainment could really become such kind of multimedia streaming. It can save a lot of investment for the pure gaming customers. And you can buy the cheapest office pc with 2d card and medium CPU, running very quiet, draining almost no power from the plugs. What a dream. This alone can pay the bill for the streaming service. At the and, the gamer can be the winner.