Clothing retailer Forever 21 hired product and prototyping company Breakfast to build them a giant screen made out of spools of thread to "print" people's Instagram photos. The screen, which Breakfast bills as "one of the most complex machines ever built for a brand", weighs 2000 pounds, measures 11 ft high, 9 ft wide, and 3 ft deep, and has a resolution of 80x80 spool pixels. Here's how they made it:
If you want to give it a try, just tag an Instagram photo with #F21ThreadScreen and it'll print it out for you (watch the live stream). Prior art alert: the first time I remember seeing something like this was Daniel Rozin's Wooden Mirror (1999) at ITP (video here).