Without PS there would be another competitor instead, there is always going to be another if someone doesn't step in, this isn't some kind of "without them nothing would exist = god" type situation, no without them MS would have still entered but at a different time and most likely aiemd at Nintendo/ the other competitor/Sega.
People give way too much credit to Sony and it's not surprising who's giving too much credit, Nintendo and Sega hardly get any credit at all let alone those before them and I know for a fact someone is going to argue on why no one else deserves all the cred, I'm not up for that type of discussion btw so leave that by the door.
Step right up come on in, feel the buzz in your veins, I'm like an chemical electrical right into your brain and I'm the one who killed the Radio, soon you'll all see
So pay up motherfuckers you belong to "V"