For Microsoft, absolutely nothing. The majority of the case was related to Windows coming with IE pre-installed, which it still does. They've reached a settlem

For Microsoft, absolutely nothing. The majority of the case was related to Windows coming with IE pre-installed, which it still does. They've reached a settlement which was not even a slap on the wrist. They've agreed to share some APIs and have a couple of people in charge of ensuring compliance for some years. Nine states + DC objected the settlement claiming that it didn't go far enough, but the appeals court dismissed their objections. In my view Microsoft antitrust is blown way out of proportions and didn't achieve absolutely anything concrete. One can claim that it discouraged similar behaviour in the next decade or so, but that's about it. As to why Microsoft is no longer considered a monopoly, I'm more of an opinion that it's Microsoft's internal decisions that did that, not anything antitrust-related.