No, you had implied that they were setting the standard for a generation with their games. I'm saying that they are just another game developer among a sea of game developers, and their exit from the game creation business wouldn't be a big deal on the game creating industry.
Maybe it's just your choice of words, but I can only gape at posts like this. If Sony exited from the game creation business today, you think the gaming world would barely bat an eyelid? It'd be HUGE! And that's just the game development. If Sony stopped their entire gaming operations, that'd be in the mainstream press and financial press as well as the gaming press.
I doubt it. If a void is created then there is always someone ready to rapidly fill it.
Doesn't mean they'd be any good. The thing with Sony is they've proven they're a positive influence, both in reaching a wider audience and in investing in developers. the loss of a good teacher in a school is rarely accompanied by an equally good teacher replacing them, because good teachers are hard to find. I reckon good console companies are few and far between too, and should Sony exit, we'll get a period of super crappy machines and maybe even EA and Ubisoft boxes, fragmenting the hardware base even moreso.
Sony are replaceable - everyone's replaceable. Would anyone else be as good to the business as Sony? That's a complex debate based on a lot of speculation, but I'd say Sony overall have been very good for the industry and helped in considerable part to get it where it is now.
Is Sony irrelevant? Definitely not! Their loss would be huge, make massive shockwaves, and leave a vacuum in the console space. Sony's contributions have not yet been made small enough that if they fizzled out, barely anyone would notice. Heck, in real terms Sony are probably the single largest identity in gaming. Just as Apple is synonymous with mobile and their departure would be huge, despite being half the size of Samsung and an even smaller piece of the overall pie, Sony and PlayStation is synonymous with home gaming. They haven't struggled and faded and become a non-entity that no-one will miss.