Antigrav will give us flying cars, but more importantly it'll reinvent jetski technology. These seacraft hoverpods look sexier than those pod racers in Star Wars: The Phantom Menace. Plus you could zip up onto the beach and spray sand in the face of the jock who bullied you during high school.
Scott Robertson loves to draw hovercraft, or "los aerodeslizadores" as they say in Spanish, which sounds a whole lot cooler. Even though they aren't touching the water, they look like they could cut right through it with the knife-edged fins, and check out the wake they're tossing out behind them. You wouldn't want to get sucked into one of those engines, but you'd probably love sitting behind the wheel of one of these things.