I mean, objectively speaking, when it comes to displays we're still not even close to perfect. In terms of content, even a 4k HDR bluray disc is equivalent to an MP3 in terms of compression and transparency compared to source. and thats the absolute best any consumer can get. Streams and broadcast are extremely lossy. You have to choose between judder (OLED) or blur (LCD) in 24 frames per second films, because the sources themselves use a low temporal resolution that the display either exposes with judder or disguises with blur. One of Dolby Vision 2's "enhancements" is supposed to activate motion interpolation/fake frames "according to the studios creative intent." Brightness is an issue.
In games, to completely eliminate persistance blur, you need over 1000hz refresh rate. Only the fastest OLEDs can hit even 500hz.
Meanwhile home audio is a mostly solved problem if you have the money and time.
