I'm kind of bummed they emulate the Atari 5200 and not the Atari 800 (and Atari 400). The 5200 was the game machine, but no keyboard/floppy drives. But (if I recall correctly) the hardware was pretty much the same except they mapped the graphic/sound/etc. chips in a different section of memory but conversation was pretty simple (although the joysticks might have been analog).
Point being, besides the few super popular cartridge games they likely converted for both, there are a few Atari 800 games I wouldn't mind checking out after a few decades of not playing them...
I liked the 7800 but never played one once they came out, I remembered seeing it at CES one year.
(Atari 5200 + 2600 = 7800)
Gary
I never even heard of the 5200 back then. I had a 7800 and remember that I was able to play 2600 games on it as well.