Word of New Russian SAM System

RuAF General Alexander Zelin is saying that Russia is looking at developing the S-500 air defense system, and that it should have significantly improved capabilities over the S-400 (NATO designation SA-21 Growler) currently in deployment with Russian forces.

Not much in the way of specifics beyond it having a 600km (!) range, which implies that it has the kinematics to perform anti-IRBM duties too.