I think pixel art by itself is rad and has an audience that appreciates it. For games though, even beyond the problem of the audience not getting the point, in the age of retina displays there are many technical roadblocks with getting the pixels to stay blocky and render the way you want. If one was so inclined to stick with blocky pixel art, one could always render the bitmaps' pixels as filled vector rectangles an…
Huge blocky pixel art never really looked that way in the first place. The pixels in Atari/NES games were made to go through the various distortions in the video pipeline (composite crossover, scanlines, flickering, misaligned electron guns and all that) that left them with all the hard edges blurred off.
The aesthetic is totally based on people running emulators showing you the framebuffer in a way it was never meant to be seen.