Well, unlike demos it's the full game with no parts missing.Also, it's not 'free early access to games', it's paid access to what essentially amounts to elongated demos.
Dragon Age is only 2 hours of gameplay, but it sounds like the sports titles may be unlimited play for 5 days.
If Microsoft offered a more expensive Xbox Live sub that had better games on offer I'd definitely sign up for it.I wonder who's next to follow this model? I'm sure there are others. Oh hell yes! Make gaming a service like Netflix, charge me minimal to have access to a crazy list of games, plus discounts on those games I want to buy and I'm all yours. This be the hotness!