The concept is interesting. But these machines would need specific adjustments so that in terms of driving they are more realistic and achievable. For example, make them on 4 wheels but they must be pendulums. Just like the handlebars should also be of a new type; why not pendulum also. Finally, I don't believe in the 3 or 4 seater versions. On the other hand, in 2 seats in a row with sufficient legroom for both the driver and the passenger, I say yes. Basically we would have a motorcycle equipped with a roof and doors and with two car seats. All on 4 motorcycle-type wheels which tilt in turns.