The Dell Inspiron Duo is an impressive sight. It’s not often that we’re this enamored by a device’s physical design, but the Dell Inspiron Duo simply does it for us. The machine is a feat of engineering, and it really redefines the convertible laptop segment. This 10.1″ machine is part netbook, part tablet, but unlike many rivals, it doesn’t compromise much in terms or portability and form factor to be both.…