Microsoft had to make an entire operating system to make this the case for running Xbox games. Sony had to make an entire operating system to make this work for PlayStation games. I don't really know why that's significant.

Microsoft’s core competency is a general purpose operating system that can be used for anything and work with infinite combinations of hardware.

The fact that you can almost, sort of use a Windows PC as a gaming console, even with all the headaches that come with it, is something of a miracle.

> Valve had to make an entire operating system

A Linux distribution. Which is often done by one person. Zero snark intended.

Valve did not write Linux from scratch or something...