While our science might be lagging behind the wizardry in the Harry Potter universe, us Muggles are closer than ever to create cloaking devices. By using nano-particles that scatter light waves, the objects being hidden would take on the qualities of an object's exterior. Current plans are to use this new technology on antennas and wires, as a functional and cosmetic improvement.

Source: http://phys.org/news/2016-07-scientists-closer-invisibility-cloak.html

Image Source: By Z22 (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons