I don't know how you think, but for me the unicycle is a stuff that should only be used in circuses and carnivals. Aside from the wild hobbyists and street performers, the one-wheeled bicycle isn't typically the preferred vehicle for getting around a crowded city. I'm wrong?
Someone says yes
Riding the "classic" unicycle may have too long a learning curve, but modern self-balancing electric unicycles are far more affordable.

Titaa, a decidedly atypical unicycle
The concept of Huskies Design is a modular vehicle with a dual function, which can switch from an electric bicycle to a self-balancing unicycle.
Getting to know our cities through different means of transport takes us to places that we didn't even think existed. This is just the kind of electric bike we might see whizzing on the Santa Monica Pier, the Naples waterfront or the Paris boulevards.
In its complete form, Titaa is a two-wheeled electric vehicle in the form of a cargo bike. We sit down (in my opinion a bit uncomfortable) and go.

In the unicycle version, the front wheel literally "enters" the rear one and the system folds up completely, leaving only the rear wheel (the one that incorporates the engine) operational.

Yes, but why?
I appreciate practically all of Titaa's stylistic solutions. Its versatility, the fact that even as a unicycle (similar in appearance to single wheel hoverboards), it offers an optional seat, its somatosensory control system. The fact that it adapts to the natural movements of the body to stay in balance and respond in real time to the necessary braking. I like everything.
What I don't understand is how useful it can be, but I was born in the last century, and maybe the motivation escapes me.