Optic fibre material which induces invisibility has already been developed.
Optic camouflage
Science has become so advance that 'space age' materials are being developed for levitation performance. As in Iscarus Effect and in Aluin technology. The latter is said to cost $1500 to purchase, and is an anti-gravity material and when worn, enables one to levitate into the air. Also is the Peter's elevator 2, which also enables levitation.