Each disabled player faces a unique challenge for many reasons, including the relative lack of accessibility-oriented peripherals for consoles. Microsoft takes a big step forward to solve this problem with its Xbox Adaptive Controller, a device created to meet the needs of gamers for whom ordinary controllers are not an option.
The XAC, officially revealed during a recent event but which also leaked a few days ago, is essentially a pair of gigantic programmable buttons and an oversized directional pad. The 3.5mm ports at the back allow you to connect a wide variety of assistive devices such as blow tubes, pedals and accessories made by Microsoft.
This is by no means an all-in-one solution, rather like a hub that allows disabled players to easily create and adjust their own configurations with a minimum of hassle. Whatever you are capable of, whatever your comfort, whatever your equipment, the XAC is designed to activate it.
I would go into details, but it would be impossible to do better than the extremely interesting and thorough post of Microsoft presenting the XAC which deals with the origins of the material, the personal stories of the testers and creators, and so much more. It's really worth the time to read.
I look forward to learning more about the system and how its users use it, and I'm happy to see that inclusiveness and accessibility continue in a practical and carefully studied manner.