I think people are also equating apples to oranges here. Vision is analog. There is no "DPI" or "FPS" that human vision can see. Some types of motion the human eye can perceive at thousands of "frames" and others it can only perceive at 60, some colors (green) and contrasts it can distinguish extremely fine detail in and other's (blue), it cannot. Ultimately it's variable and non-digital so it's never going to equate to some strict terms.
The audio, on the other hand, that reaches your ears comes from an analog source, even if it ends up digital in between. There aren't some resolution arguments to be made here, all that matters is that the output device can accurately reproduce the proper analog signal. Which has been proven time and time again, and that any simplification of said signal is imperceptible to anything but the most finely tuned listening devices (or maybe some special "golden ears" that the vast majority of audiophiles don't belong to).
The audio, on the other hand, that reaches your ears comes from an analog source, even if it ends up digital in between. There aren't some resolution arguments to be made here, all that matters is that the output device can accurately reproduce the proper analog signal. Which has been proven time and time again, and that any simplification of said signal is imperceptible to anything but the most finely tuned listening devices (or maybe some special "golden ears" that the vast majority of audiophiles don't belong to).