I think cardboard furniture is more of an art and actually not very usable in real life. A few years ago some students from architexture department built cardboard sofas/lounge type seats and put them everywhere in our universcity. In a couple of weeks those seats were worn, full of stains and ugly. Cardboard furniture usually presents itself as eco friendly but rarely is. Most of that stuff is made out of brand new cardboard to get that nice and clean look, not from old packaging like some advertize (the beat up, torn cb boxes that wouldnt be half as nice). And looking at the layouts of those chairs...thats a massive amount of cardboard that goes into them. Considering the lifespan of the product and the amount of materials/resources, I think this stuff is for show only.