You are right, that there are no games now bound to the cloud right now. But look at Microsoft business model in other areas. It’s all software as a service, web apps in the cloud, that businesses pay a subscription to use. It’s great way to extract value from customers, because it gets harder and harder to move away from these platforms. Your data, save games, your friend list, your ability to play multiplayer and so on, get increasingly locked to one platform, which makes it harder to move. And then Microsoft can just collect rent, they don’t have to innovate or compete on a free market. This trend is sometimes called techno-feudalism.