They're low emission, cost less to operate and are quieter than helicopters. Pop culture refers to them as flying cars, but the technical term is EVAs - electrical vertical aircrafts. CNBC TechCheck's Carl Quintanilla chats with BLADE Urban Air Mobility CEO Rob Wiesenthal on inking a deal with Beta Technologies for 20 passenger EVAs by 2024 and why he thinks getting this idea off the ground has finally reached critical mass.