No I don't think they're saving gaming. Gaming will exist no matter what, even with a full blown AAA industry collapse.
But I do think they consistently have been more interesting this gen in a number of areas, and I've pointed this out for 3 years now. 1) Helping to keep the E3 season culture alive with great showcases multiple times a year, but always every June. 2) Helping give consumers cheaper ways to play games while everything else is getting more expensive (GP, Series S), 3) Helping fund more experimental and bizarre niche content while the rest of the industry is going more mainstream, 4) Helping lead the way in BC efforts for consumers and dual entitlement on PC, 5) now potentially helping to lead the way on exposing more people to open store ecosystems. That's not saving gaming, but it's a whole lot of stuff I've been into for years.