Nice project, it makes Berlin appear like a progressive, nice place to live. But actually it has so many problems that should be solved first before even thinking about things like this. For instance total failure to integrate the Muslim minority, increasing racism against Jews (Men usually wear a baseball-cap over the Kippah in public due to fear of being beaten up), prices that double each 7-10 years while salaries stay the same and an angry lower-middle class that thinks Politicians don't understand anything.