They're display devices, they don't need their own operating system. Microsoft's problem was actually that they did what you're talking about - Mixed Reality h

They're display devices, they don't need their own operating system. Microsoft's problem was actually that they did what you're talking about - Mixed Reality had all of these nonsense things microsoft built into it that didn't improve the experience and just put barriers in front of using the device to play games or whatever. When you plugged in the headset it would automatically pop up mixed reality whether you wanted it to start or not. I couldn't keep mine plugged in and not running reliably. It would restart mixed reality at random times. When you logged in instead of a well designed menu system, they made it stupidly spatial and you had this virtual house where functions were in different rooms you had to navigate to instead of just letting me start the application I wanted. It had a whole new set of widgets and interactions. A lot of designers got paid to create little toys that didn't improve the experience at all and just complicated things. And microsoft's own device wasn't aimed at consumers and cost more than the vision pro, so you were buying HP or some other 3rd party's implementation microsoft's of mixed reality on windows. It was fine to play games but not an improvement over steamvr.