content: They'll add it in slowly.  Microtransactions in Solitaire were just the start.  They'll eventually have things like a paid version of their web browser, and ads for it that bug you if you haven't bought it yet.  New versions of the built-in accessories or crippled ones that want you to upgrade for a monthly fee, or to unlock it with some sort of Microsoft WindowsCash.  Any program that doesn't come through the MS Store will fire off a warning that it's not a Genuine approved MS Store app, discouraging non-savvy people from using anything that they don't get a cut of.  Paid upgrades for quicker access to security updates, then any access to them.  After they make the latest IP networking stack a required paid upgrade, they'll move to a Season Pass that covers everything instead of paying for it piece by piece with MS coins.