The word every AR and VR practitioner circles back to is presence — the moment a rendered space stops being a picture and starts being a place. What is striking, after enough projects, is how little presence has to do with polygon counts.
Presence has specific, cheap triggers. Consistency: the world obeys its own rules — objects rest on the terrain, shadows agree with the light, nothing pops or slides. Responsiveness: input answers within a frame or two, and the camera never fights you. Acknowledgment: the world reacts to your being there — parcels light up as you approach, a scanner locks to what is near you, discovery accrues to your name.
Notice that none of those require a headset. A flat WebGL world like the Holovate frontier can hit all three, which is why walking it feels different from scrubbing through a product carousel, despite both being “just a webpage”.
The corollary cuts the other way: a photorealistic scene that stutters, ignores your input, or lets objects float breaks presence instantly, no matter what it cost to render. Presence is a budget you spend on behavior first and fidelity second.
That priority order — behavior, then beauty — is the most transferable lesson immersive work teaches, and it applies to ordinary interfaces too.