So they've found a way to make plastic sheets that are like corrugated cardboard... (And impermeable to gases and liquids)... I do think it's a big deal but I'm not sure it's a game changer, It sounds like the usage case is to still use other materials as the basis for structures and 'things' and then put this stuff over it to add a layer of lateral strength and environmental protection...
The use I want to see is in packing materials, You could drive people crazy with a sheet of unpopable bubble wrap