Every Microsoft-published game will now be available on Xbox One and Windows

[PsychoFish]

I can't understand their rationale behind this. Where is the incentive now to buy an Xbone? The only reason one should consider it now is to have integration with their other entertainment systems. That or if you can't afford the PC.

It's part of their "One Strategy, One Microsoft" mantra.

To quote from their 2013 blog post

We are rallying behind a single strategy as one company — not a collection of divisional strategies. Although we will deliver multiple devices and services to execute and monetize the strategy, the single core strategy will drive us to set shared goals for everything we do. We will see our product line holistically, not as a set of islands. We will allocate resources and build devices and services that provide compelling, integrated experiences across the many screens in our lives, with maximum return to shareholders. All parts of the company will share and contribute to the success of core offerings, like Windows, Windows Phone, Xbox, Surface, Office 365 and our EA offer, Bing, Skype, Dynamics, Azure and our servers. All parts of the company will contribute to activating high-value experiences for our customers.

there will be four engineering areas: OS, Apps, Cloud, and Devices.

Bla bla bla...the bottom line is that your gaming platform is Microsoft and as such the Xbox, "PC" and any other device running a MS Operating System is simply becoming a delivery platform. They want the choice of hardware to become irrelevant.

Hell, at the rate they're going the operating system might become irrelevant at some stage and things will go to a "requires an x86_64 capable processor" type route, but that's mainly just wishful thinking.