We have a similar approach here in Germany. Anyone has the right to install a small solar system on their balcony or similar and feed up to 800W into their local grid. You just mount it and plug it into your house/apartment grid. Technically you have to get it registered, too.
The sky is not falling, buildings are not crumbling and the grid is not burning.
It's not revolutionary either, but slowly picking up traction. You see more and more installations here in Berlin. On the country side where people have their own house and enough space it's a total no-brainer to set up one of those mini solar systems.
The typical systems you can buy off the shelf (800-1000W panels + inverter) amortize after a few years already, and are getting cheaper every year. I have the feeling the main limitation in the city is having a nice balcony with good mounting points.