If the truth be told, they've long been promised but are still to be delivered.

That could all be about to change, though, thanks to news about Doroni Aerospace's H1-X flying car.

The Miami-based company announced that customers could receive the first units of the H1-X as early as 2025 if everything goes according to plan.

Later this year, Doroni plans to test the H1-X and is confident it will received Federal Aviation Authority (FAA) certification by 2025.

We've already seen the Xpeng X2, which recently made its first cross-river flight.

Then there's the colossal 40-passenger flying taxi bus that would transport people 331 miles in one hour.

Meanwhile, the H1-X is the next generation of the company's H1 flying car.

It's got four ducted lift and propulsion fans, each powered by two counterrotating co-axial motors.

"We redesigned the entire airframe for improved aerodynamics," CEO Doron Merdinger told Robb Report.

"We felt we had to come up with a design that maximized speed and range, while also fitting in a two-car garage," he added.

The H1-X flying car is intended to be an eVOTL that will replace cars and trains as a means of transportation for commuters.

It'll be semi-autonomous and controlled by a joystick for easy flying.

It'll also come equipped with anti-collision sensors, a barometer, LIDAR, and optic-flow camera to ensure situational awareness and safety.

What's more, the H1-X has multiple fans to increase redundancy in case of a system failure, and a ballistic parachute for total failure scenarios.