I like where this is going. A 3D QR (on the city scale) could relay one type of information from above and a totally different one from ground level, as an elevation. There's a lot of play that can happen there.
Thanks for the insightful comment @sammarkjames :)
Yeah for sure, and it's scaleable too - hence my question if anyone has invented something like this yet? I've noticed these perspective drawings where you see different images from different angles, so it must work with a QR code/someone must have done it! If not then...I'll errrr, be right back...in a few weeks :P (I won't really, I'm not clever enough to create this).