When quantum computing matures, it will not just simulate HD environments; it will generate them. A quantum-generated environment will have internal dimensionality. You won't "enter" a simulation; you will unfold into it.
Once you see a true HDThings signal on a compliant display, you will realize that everything you have been watching your entire life was a lie. Current HD looks like a cartoon. It looks like a simulation. HDThings reveals the texture of reality. You see the oil in a human pore. You see the individual dust mites floating in a sunbeam. You see the weave of a cotton shirt three blocks away. HDThings Will Be Different