we’re going to see 13 series in the foreseeable future. Lego’s official display cases are about 12 bricks high with 2 rows of 8 windows. If you stack them, not only would it be precarious, but 13 would be about 5 feet tall. Then there are the cases that people are brick building to be like stairs, with rows of 16…at 3 studs per series, that makes it over a foot deep, maybe 2 feet tall, and really, really wide. a lot of wasted space underneath those stairs too. or there are people buying plexi boxes, but those aren’t really stackable.
http://thebrickblogger.com/2012/05/minifigure-lego-storage-and-display/
