I know this seems like it's new but it's actually been around for quite a while. They are called LED walls and are used throughout cooperate AV, tradeshows, concerts, etc. Slightly different tech but really the same exact principle we have been using for years. Samsung is just making it for the average consumer vs the professional market. LED walls are modules stacked and linked together. A controler distributes the signal across the wall and there you have it. For instance, at CES, one the walls I built, on the smaller side - roughly 9' tall X 16' wide used 50 LED tiles. Each tile has 4 panels that can be popped out and replaced if pixels go bad or get damaged. It's cool but nothing new. Now the TV's that roll up, that's pretty bad ass.