Cool idea, looks like it needs some help on the execution.

You can't adequately lock a bike to those wall racks. No way in heck I'm locking by the front wheel only "D-lock compatible" or not. Gotta give me something where I can lock the frame and rear wheel (and then I'll secondary lock the front wheel to the bike) or I'm not using it, no matter how "pretty" it looks.

And in some areas even that's not enough. The locking, fully enclosed, bike boxes (like we have at our bus stations) are much better as far as bike (and stuff) security, and you can stack I'm guessing about 8 in a parking space (so similar density).