A fun toy. But a normal exercise bike already converts the energy to heat. This heat then warms up the apartment.
Of course, with electricity, a heat pump for heating or cooling could be used, which is more efficient. But it's not like the energy remains unused with a normal exercise bike, as long as it is cold outdoors.
They probably also need an irrigation system? Or need to be watered daily? They don't look like they would hold a lot of water when the sun evaporates everything.