Honestly..it's rare that something..a story or experience whether as a book or movie, let alone a game.... makes me feel like...I just witnessed greatness...something of a likeness that may never be seen or experienced again...its just one of those experiences you feel you know? Like a concert or attending a sports game or an event....A moment.
The graphics, the acting, the story, the different game-play style, the complexity, the physics, is all unprecedented. The one thing that makes it not as commercially viable..well two things...is that the story is weird..but in that awesome sort of sci/fi way. That and the fact that it's not your shoot and kill and blow stuff up type of game. It is also a slow burn both in terms of story and what you have access to in order to help accomplish your goals.
Someone said it best by describing it as a piece of art. It truly is the best game I've ever had the privilege to play. It probably just set and unreachable bar for anything after.