The unibody aluminum construction isn't only stylish, it serves the function of also being very sturdy and ultra-thin. If this new patent published by the USPTO is anything to go by, future iPads might trade in their famous aluminum shell for an ultra-strong carbon fiber.
“Reinforced Device Housing” as it describes as an outer casing for an electronic device composed of “layered fiber-in-matrix type material,” or a carbon fiber re-inforced polymer. You can see from the illustration, they seem to use the back shell of an iPad in a patent illustration.
This may for a redesign of the OtterBox Defender iPad Case...either that or it will cause a rash of Aluminum Unibody iPad 2 cases being developed!