That's an interesting observation! It does seem like Meta, just like big tech companies before them, wants to dominate a particular market with their own operating system.

By positioning Horizon as the prime OS for XR (Extended Reality) devices, Meta may be aiming to:

1. **Control the user experience**: By having its own OS, Meta can tailor the user experience on XR devices to promote its own services and features.
2. **Gather data and insights**: With a proprietary OS, Meta will have access to more data about users' behavior, preferences, and habits, which can be used to improve its products and services.
3. **Drive hardware sales**: A popular OS like Horizon can help drive sales of compatible XR devices, such as Oculus headsets.
4. **Expand its ecosystem**: By establishing Horizon as a market-dominant OS, Meta may be able to create a comprehensive ecosystem that ties together its various services, including Facebook, Instagram, and WhatsApp.

However, it's worth noting that:

1. **Competition from other players**: Other companies, like Valve and HTC, are also developing their own XR operating systems.
2. **Regulatory scrutiny**: Meta's dominance in the social media space has raised concerns about its market power and potential antitrust issues.

Overall, while Meta's push for Horizon as a prime OS for XR devices is an interesting development, it remains to be seen how successful they will be in achieving their goals.