Major Nelson announced via Twitter that the Xbox One Wireless Adapter, which previously was only compatible with Windows 10, is now capable of working with PC's running Windows 7 and 8.1.
In March, Microsoft announced that all wireless accessories for the Xbox One would eventually be compatible with Windows 10, and that a wireless adapter was on the way. Support for the wired Xbox One controller wasn't even available until last June, which does support Windows 7-10.
Even I have been known to use it with Elite: Dangerous at times because of the convenience of being able to plug it in as well as its size compared to my full HOTAS setup. So this is good news because it's a feature we're getting completely for free.