I'm not gonna retread the things said by others, but I agree with the problem being with AAA and not with indies.
Not only are AAA games safe because of financial risks, but it's also a lot easier to take an established idea or a current IP and build from it. So time is a big factor as well. Just look at games like Horizon and Sucker Punch's next game. We've gone from a 2-3 year dev cycle to something that often takes 5+ years. If you are a publisher/developer and you're looking to build a large new IP, a new engine, and a completely fresh experience, you're going to have to give it far more time than past generations.
With advancements in technology, like 4k, I can't imagine it is easy to keep up. We haven't even nailed 1080p/60fps yet. It would be great to see everyone just focus on that milestone, then look to push 4k. If technology keeps trying to one up itself, development is bound to implode at some point.
The beginning of this generation was pretty abysmal, with a ton of sequels and remasters. Couple that with the lackluster performance of many of the promising new IPs like Sunset Overdrive and The Order: 1886, and you've got a pretty bleak outlook. But this generation is finally starting to pick up some steam. If it can survive as long as the last one, I think we're bound to see some really great AAA games in the coming years.
I mean every generation so far had his game who define it, who create a new genre or make one genre better, what game has done that for this one ?
Snake Pass is a 3D platformer with a completely unique way to traverse even though the genre has been around for 30+ years.
Thumper is a new type of rhythm game, and one hell of a VR game.
Resogun, Nex Machina, and Matterfall are revivals of the arcade that reimagine concepts and genre's from the 80's and apply the technological advances of today.
Velocity 2X merges the SHMUP genres and platforming effectively.
Lovers in a Dangerous Spacetime's gameplay is a unique hybrid of twin-stick and simple platforming.
DOOM has one of the best campaigns in FPS history.
Horizon is not only one of the best looking games, but it has one of the best implementations of Photo Mode - a fairly recent addition to games.
There's been a progression of the Team Ico spirit through not only The Last Guardian, but indies like RiME and Abzu.
No Man's Sky pushed the limits of procedural generation.
Survival games, roguelike/lites, narrative driven games, and exploration games (walking sims) seem to be hitting their stride, and becoming more inclusive.