SYDNEY—Paramedics with jetpacks, border police in flying cars, and city workers commuting by drone all sound like science fiction—but the concepts are part of an advanced air mobility (AAM) market that is expected to be worth as much as $17 billion by 2025. As urbanization leaves city streets congested and advances in technology allow for vehicles considered impossible just decades ago, using the sky for small-scale aircraft has become increasingly attractive. “We can’t continue to use road transport; 3D mobility is really important,” Anna Kominik, Asia Pacific Director at Wisk, said in an interview broadcast on Thursday at the Reuters Next conference. Wisk, a joint venture between Boeing Co. and Kitty Hawk Corp., has been testing Cora, an autonomous electric aircraft that takes off and lands like a helicopter, at its base in Tekapo, New Zealand, for four years. Wisk is liaising with regulators, including the U.S. Federal Aviation Administration, …