This would be lame. It takes all of the fun out of building a computer. It also means that if you want to play games, you will probably have to start shelling out a large monthly fee regardless of what game you play.
Someone mentioned that it would hurt sales for nvidia/ati, but I don't know about that. I mean, this company will have to buy a ****load of them and they will also have to keep upgrading to keep the gameplay silky smooth so people don't complain. The industry would just change a little.
I would be ****ed if this is what gaming turned into though.