Re: "It will do 4K video"
If you are interested in how to program them (on emulators primarily obviously) I recommend this book
https://www.amazon.co.uk/dp/B01N4DSRIZ/ Making Games for the Atari 2600 by Steven Hugg.
For a more general book about it there is Racing the Beam by Ian Bogost (who you may have heard of) and Nick Montford https://mitpress.mit.edu/books/racing-beam
It is somewhat academic in tone (I mention that not as a pejorative term, but to give an idea as whether it might be for you)
Biting the hand that feeds IT
