In the contemporary, modern cities, with their heavy rural areas, there is a free area which is depending from the city itself. Its like a projection of the city towards the sky, on the rooftops of the buildings. These multiple areas are part of a network, a host of somekind. They have the ability to receive additional constructions with multiple uses.
This “relationship” also exists in nature, its found between the parasite and its host. A situation of balance, where the two organisms mutually benefit. This is called symbiosis.
The advancement of agile, transient systems who “leech” in the space above the city, gives a solution to the problem of high density and the lack of space and can accommodate common-used areas for the residents of the building and the nearby region.
So, the usage of the rooftops could largely improve the image of the city and could be a start for new “wondering” in architecture as far as the terrain of the city is concerned.