The point is that audio resolution peaked, and additional returns were negligible at best. Video has the same effect occur somewhere around 300 PPI at 6" view distance, 200 PPI at 12", etc - and between 90 and 150hz refresh rate. Color fidelity is also near its limits on some high end IPS panels.
Past those points, most people don't notice the difference, just like how most people don't notice the difference between 16 and 24 bit audio at 44.1 or 48khz sample rate. Once the vast majority of people no longer see a difference, the technology peaks. I think video is (finally) approaching that territory in the next 5 years, at least in 2 dimensions. I feel holographic 3d video will see a boon after that, and not the eye trick 3d crap we have now.
Past those points, most people don't notice the difference, just like how most people don't notice the difference between 16 and 24 bit audio at 44.1 or 48khz sample rate. Once the vast majority of people no longer see a difference, the technology peaks. I think video is (finally) approaching that territory in the next 5 years, at least in 2 dimensions. I feel holographic 3d video will see a boon after that, and not the eye trick 3d crap we have now.