Oculus recently detailed some new system requirements for their Rift VR headset, and it doesn't look good for users on older legacy operating systems. Indeed, Oculus Rift owners with Windows 7 and Windows 8.1 will now need to upgrade to Windows 10 to meet minimum system requirements and continue enjoying new experiences (via Tom's Hardware.)
The change in minimum system requirements reportedly impacts less than 5% of Oculus Rift owners who are still on Windows 7 and Windows 8.1. Users who still choose to run the legacy operating systems won't lose access to their Rift headset. They instead won't be able to enjoy new features, and find that some games and apps won't work with their headset.
Mandatory Windows 10 support is coming to ensure maximum compatibility with features of the revamped Oculus’ Rift Core 2.0 update. Oculus notes that Windows 10 also helps the company "deliver the best performance standards for Rift owners while aligning with industry standards."