... then what the world be like without Nintendo's existence ?

Maybe ?

We would have Sega, Sony, and Microsoft by now but it's not known which one would've came out on top of each other ...

Handhelds specialized for gaming wouldn't have been made until much later and also wouldn't be very mainstream until later on ...

If we consider a world without Nintendo facing the game crash we would have to dwell on the realm of speculation and parallel realities.

If we consider a world without Nintendo TODAY, then I will just say that the majority of gamers don't play on Nintendo consoles.

It would suck and probably not be the same. And no. We would NOT have Sony because they joined the industry in partnership with Nintendo. The PlayStation was a joint project and an add-on for the Super Nintendo. Which Nintendo abandoned because it was not "good nor powerful enough" to fit their visions. They dropped it and Sony finished it. Huge mistake on Nintendo's part. Could you imagine a world where Nintendo and Sony were still together today? Crazy!

As for Microsoft. The MSX may have done a bit better and been successful... maybe not but PC gaming would have still evolved. Sega would probably still try, but may have backed out. Then again would Sega have made the Master System if it wasn't for the NES?

It's impossible to say. We live in a world where games have developed along with technology. If Nintendo hadn't pulled gaming out of the gutter, gaming might have been left untouched for years or even decades before people wanted to give it another go, and in that case I can barely imagine what things would look like developing from a dead stop like that. Plus they brought multiple revolutionary ideas to the table, which might have taken a lot longer for others to "discover". The entire industry would be completely and entirely different. Not necessarily better or worse--just massively different.

I wonder what Universe #388814 me is doing right now, probably saluting to Phil Spencer as we speak.

Like you said, without Nintendo, then we don't have Playstation, maybe even Xbox and PC games

Honestly I don't think the impact will be as big as others seem to think. Sure it would be sad but I think gaming has reached a point where Nintendo's exit wouldn't substantially impede the industry. Thats if we're talking consoles. If we're talking handhelds then the entire market would be fucked and Japan would go fullblown mobile.

Sony used to be a third party before entering 5th gen so it's not as if they were total strangers in the game industry and who's to say Sega wouldn't have partnered with Sony in the similar situation Nintendo did or even Sony pushing out a new platform of their own volition ?

And yes Sega would've still made the Master System considering their prior platform was the SG-1000 ...

I dont know if SEGA would have come up with the side scrolling, battery back up saving, the arrow pad, shoulder buttons, rumbling control, etc etc, Gaming would have stayed in the gutter, which would have led to decades of bored teenagers absorbed in TV/Home Video Violence which would have led to a very violent everyday living which obviously would have caused local authorities to be unable to perform it's duties therefore bringing chaos to the civilized world in which education took a backseat to survival and territory conquering which pretty much meant World War 3 which only could have ended with a total use of nuclear missiles by the USSR and US government which would have destroyed humanity in its entirety.

Thank you Nintendo.