PBS created this good short video on the evolution of 8-bit art for their Off Book series. Worth a watch even if you know about the 8-bit scene.
Beginning with early Atari and Nintendo video games, the 8-bit aesthetic has been a part of our culture for over 30 years. As it moved through the generations, 8-bit earned its independence from its video game roots. The idea of 8-bit now stands for a refreshing level of simplicity and minimalism, is capable of sonic and visual beauty, and points to the layer of technology that suffuses our modern lives. No longer just nostalgia art, contemporary 8-bit artists and chiptunes musicians have elevated the form to new levels of creativity and cultural reflection.