The innovation of the S-97 and it’s kin isn’t the main rotor but the pusher propellor which allows it to operate at speeds and altitudes far above what a conventional helicopter can achieve but it’s not fast enough for the main rotors to be locked in a fixed wing position, mainly because it’s not a good trade off for the roles which these fill.
It overall it kept quite a few design elements from the X wing such as the rigid wings on the main rotor and that the forward propulsion is achieved by a pusher rotor instead of the jet exhaust on the X wing.
Those aren't new things though, and it's not the crux of what the X wing was. The rigid rotor, the pusher propeller, had all been done already in the 1967 AH-56.The X wing has more in common with the F-35B than the S-97 has in common with the X wing. The S-97 is attempting to succeed where the AH-56 failed; it's supposed to do helicopter things with a helicopter frame and fulfill a helicopter role, but maybe have a little more speed and altitude capability. The F-35B is attempting to succeed where the X wing failed; it's supposed to do jet plane things with a jet plane frame and fulfill a jet plane role, but be able to do so in places and environments where a full sized runway doesn't fit.
It overall it kept quite a few design elements from the X wing such as the rigid wings on the main rotor and that the forward propulsion is achieved by a pusher rotor instead of the jet exhaust on the X wing.