> New airborne vehicles (ground-effect machines, VTOL and STOL, super-helicopters, giant and/or supersonic jets) This is marked a "miss", but ~20 years after t

> New airborne vehicles (ground-effect machines, VTOL and STOL, super-helicopters, giant and/or supersonic jets) This is marked a "miss", but ~20 years after the nominal deadline, electric multi-copter urban mobility wotsits are all the rage.