The problem with VR is that's is just a way more complex system than a monitor. You have IMUs, cameras, controllers, lens distortion, hand tracking and a lot of other stuff to deal with. Until a little over a year ago there wasn't even any kind of API devices could plug into, it was all vendor specific.
This might all ease up a little over the coming years, we now have both OpenXR, as well has hardware that is a lot more self-contained and no longer requires the PC to do so much work. But it will still take a while until a VR headset can 'just work' the same way a monitor does.
This might all ease up a little over the coming years, we now have both OpenXR, as well has hardware that is a lot more self-contained and no longer requires the PC to do so much work. But it will still take a while until a VR headset can 'just work' the same way a monitor does.