Two-wheeled and four-wheeled vehicles are incredible - they made that any short and medium distance on the Earth does not matter. Thanks them anyone, who owns one, can get from A to B relatively fast, in relatively comfortable and safe way.
Nevertheless, they both are not perfect -- the former are totally weather-dependent and the latter still, in most cases, are harmful to the environment and depend on finite resources.
That is exactly why I believe that there really is the room for a new vehicle on the automotive market. A vehicle, which, exactly like tablets among smartphones and laptops, will give more comfort than the smaller and more freedom than the bigger.