Last week, Microsoft announced that Quantum Break would arrive on the PC. At the same time, they listed the system requirements, which included the requirement of Windows 10. It will only be available on Windows 10 (outside of Xbox One). They also mentioned that the game would require DirectX 12, which made the issue more interesting. It wasn't that Microsoft was pushing their OS with first-party software, they were using an API that is only available in Windows 10, and it had the potential to make a better video game.
Then they announced that it would only be available on Windows Store, which swings the pendulum back in the other direction. Oh well, it was nice while it lasted.
In all seriousness, we'll probably see games begin to deprecate DirectX 11 once DirectX 12 (or Vulkan) becomes ubiquitous. These new APIs significantly change how content is designed and submit to GPU(s), and do so in ways that seem difficult to scale back. Granted, I've talked to game developers and I've yet to have my suspicions validated, but it seems like the real benefit of the APIs will be when art and content can be created differently — more objects, simpler objects, potentially splitting materials that are modified into separate instances, and so forth.
Quantum Break will come out on April 5th, along with a few other DX12-based titles.