What are the effects of Atari staying around and Japan never entering the videogame industry?
Just a tiny gripe, Japan's native videogame market was already booming. Pac-Man was guzzling coins from the pockets of the worlds youth since 1980, same could be said of Donkey Kong after 1981. The Famicom was also doing well in Japan.
In this TL, where the market in North America doesn't implode, there are still quite a few inherent problems with the industry. Most generations had three systems to choose from, some two or four. The early '80s had about nine or so, far too many for its own good. Literally anybody could make a game, but without the Internet and widespread gaming journalism we have today, customers had no clue what they were buying, and whether it was good or not.
With the Famicom dominating Japan, Nintendo is bound to try and take on Atari's hegemony. Given the OTL quality of the 5200, then they might find themselves successful, Crash or no Crash. It'd be interesting to see how Nintendo would differ. IOTL, they brought gaming in America back to life by basically whipping the corpse hard enough. That means keeping third-parties on a tight leash, to focus on making
good games and not just shovelware. ITTL, however, they'll be acting like Sega or Sony, trying to charm third-parties onto their side. How they do that, I haven't a clue.