Windows 10 Mixed Reality headsets are coming on October 17th too
 

In addition to Microsoft debuting Windows Mixed Reality on October 17th, as part of the Fall Creators Update, its hardware partners will also have their VR headsets ready to go on the same day. That's not a major shock, though it's a surprise to see...

https://www.engadget.com/2017/09/01/...adset-release/