I don't think that there's a lot more spectacular evolution to come. It will be a lot of little revolutions that adds up and makes other things way better.
Danaher is credited with the leglock system but a lot of people made it better over time. The backside 50-50 attacks from Lachlan Giles was just as innovative and efficient but it looked less spectacular than when the DDS came with it.
Like the Danaher systems especially back attacks and leglocks was spectacular. Just like De La Riva, Deep half, Spider guard, D'arce Chokes, berimbolo, Lapel stuff... were something big and new at one time.
Maybe some other big things will happen someday but a lot of the better guys are on efficiency and linking techniques a lot more than they are on new techniques .
I know that Danaher is pretty big on scrimaging ( transitions from takedowns to dominant positions on the ground). The best guys games are pretty simple, based on a couple of techniques but always faster and slicker.
It's start to look like a big Pokemon card game. It's not who as the funkiest new trick up his sleeve, it's more about who built the best game and who does it the more efficiently