The Bombardier EMBRIO Advanced Concept is a one-wheeled bike (or 'mono' ike), that is supposed to run on hydrogen.  It has a hydrogen fuel cell powering the engine.

It has gyroscopes and related 'electronic technologies' that stabilize the bike during riding, just like the Segway.

Bombardier says that this concept is a 'rider-friendly' vehicle that is similar to a motorcycle.  They also say that it supports one (or more) passengers! 

Some of the accessories in the Embrio are:

• gyroscopes and sensors
• high-performance braking system
• active suspension
• night vision
• robotic assistance
• digitally encoded learning key (to start the engine)

 You dont have to panic when you stop the bike, either.  The vehicle's front wheels deploy to the ground like a jet plane landing gear to increase longitudinal stability (*whew*).

Although I am in no hurry to get one, it will be available in 2025!  Who knows...we may be driving "flying cars" in 2025!