Even though this is a mid-course interception, it's critical that we contrast it with America's GMD (ground-based mid-coure defense). GMD is targeting ICBM payloads, which travel faster and are more likely to have countermeasures. GMD is still unproven for targets without homing beacons on realistic trajectories. Long and the short of it: this doesn't mean America could successfully intercept incoming nukes from North Korea.
the newsworthy part is not the ballistic missile launch but the interception in space, where velocity is lowest but maneuvering is most difficult
though to me the biggest news was that yemen's houthi rebels have ballistic missiles now