Final Fantasy VII almost single-handedly tilted the balance in favour of the PS1.
This right here.
The PlayStation was floundering in Japan until Square announced FFVII as a PS1 exclusive. No FFVII, no Japan, and it would have severely damaged the PS1 in the United States as a result. Sony would have been stuck marketing Tomb Raider II and Crash Bandicoot 2 as its marquee games for the 1997 US holiday season, and in no universe can I see either game making as big a splash as FFVII and Goldeneye did.