It can already convince the brain so throughly of what is being seen, that people are given vertigo….Others get motion sickness from being on a ship at sea.

The visual part of the game is solved, the problem you are struggling to grasp is that VR as just a headset cannot go much farther.

What is needed now is the rest of it, the ability to touch, feel, and move freely in the VR space.

These techs are being developed, but are extremely expensive.

The least of which would be the Omni One treadmill, supposed to happened sometime next year.

https://omni.virtuix.com/