Meta has announced a new era for mixed reality (MR) with the introduction of Meta Horizon OS, a newly renamed operating system that will bring Quest and Rift OS to new, more specialized devices. Meta is also allowing third-party developers to use its operating system, which could make it the go-to platform for VR and AR devices. ASUS, Lenovo, and Microsoft are among the companies that have already announced plans to work with Meta on new MR devices.