Has this ever been considered as a parking solution?
I've seen this contraption with my own eyes. This is the parking garage for freshly bild Volkswagens in their birthplace in Wolfsburg, Germany.
Link.
http://sharathrao.files.wordpress.co...parkinglot.png
And there are not one, but two of these 20 story towers! And dar I say, they actually look very elegant. They would fit right in their place alongside the Renaissance Building.
http://static1.bareka.com/photos/medium/14573160.jpg
You'd expect this to result in a time consuming wait for your car but I think this will work actually much quicker than entering a regular parking on foot and retrieving the car on your own. And there's also a minimum chance your car will be damaged or the chance you'll damage someone elses car.
Here's a video.
[[In an actual parking situation you obviously leave your car at the front door, the robot will do the rest.)