This was super cool and I just had to video, but excuse the bad framing, it was hard to use it and also film from far enough away.
Basically, it's the same thing as Jeff Han has been working on with his wall, but apparently this has been in Helsinki for ages. It's made by students from HIT, it's amazing what students come up with... I want one!
As you can probably tell by my rambling I was pretty surprised and excited... Stefan just pointed it out as an 'oh yeah, you've seen that, right?'