They certainly reinvigorated it. Hard to say if they singlehandedly "saved" it, as in - gaming would have died or virtually be dead without it. I probably wouldn't go that far.
I do think without the NES gaming would have EVENTUALLY recovered. Though not nearly as quickly, and not nearly in the same manner. It probably would have carried on as a more stagnant and less inspiring medium, maybe even leading up to today. It would certainly take on a very different look, especially in the US.

"We hold these truths to be self-evident - all men and women created by the, go-you know.. you know the thing!" - Joe Biden








