you bring shame to the world of robots!
there are humans that can achieve 100% notes. mere, humans!
Some of the songs on Beat Saber, on Expert Plus, are effectively impossible for any existing 7 axis serial robot arms to actuate fast enough to equal the best human players if you strapped VR controllers to where the end effectors are. Maybe some sort of parallel robot (like a SCARA) robot could do it.
Two robot arms with 7 degrees of freedom (the extra degree to allow them to avoid colliding with each other), plus the camera has to also move to avoid obstacles. It'd be really tough to beat the best human players, from a mechanical point of view. You'd need custom robots.
I looked into building a robot arm which could cook breakfast. It's almost ludicrous just speccing out the torque requirements to pick up a skillet.
You end up having to pick harmonic drives and less speed but more stiffness, or hydraulics, which are lighter, but messy, less stiff (can be both good and bad) and less reproducible.