As successful as the Rolls-Royce name has been in luxury cars, it's been far bigger in aeronautics. The two are very separate companies at this point – the car company employs some 1,300 people, but it's absolutely dwarfed by the aircraft motor business, which employs around 50,000. So when these guys announce a four- to five-passenger hybrid electric/turbine VTOL aircraft concept with a 250-mph top speed and a 500-mile range, it's worth listening.