Marketing Fitness Version
The biggest mistake companies are making with VR is that they're marketing it to people who prefer to sit. If you take the Oculus Quest, give it a comfier, more breathable padding, bundle it with a few fitness apps and call it the Oculus Fit, you're done.
You can sell it in fitness stores, you can add a heartrate monitor, you can add bells and whistles. But, really, just letting people know they can get exercise in a cool, fun way would be enough. Think WiiFit.