I find the "Really Cool Signage System" to be really, really bad in terms of design solving real world problems. For someone in a moving car, signs should be obvious. Furthermore, seeing these signs at the proper perspective might be somewhat disorienting for someone who is, again, driving a moving car. Not to mention unreadable from every other direction. I can't believe this is being touted on various websites as great design. It's horrible design.

and what does "cool" have to do with "good?"

I'd just like to point out that the "cool signage" might not be as big of a problem as you think because people drive so slowly in a parking garage and a good portion of the navigation is really on foot.

So this design has the cultural value of smoking? It's cool but bad. I can buy that . . . intriguing to see but potentially dangerous to your health.

I can imagine myself late for an appointment, trying to navigate the parking garage and having to experience the 'cool' perspective trickery, while pulling my hair out. It probably wouldn't slow me down much because it's somewhat legible, but it's just the idea of making navigation more confusing that doesn't make sense. I think it could be much better, taken much further in the form of a gallery installation.

Remember what Sagmeister did with the toilet paper in the trees? That was super cool, but imaging having to read that lettering to find the bathroom in an airport.