Invisibility or lets say really good camouflage may be a reality soon thanks to SILVER

Silver nano particles just like the the skin on Octopi, squidsm and cuttlefish is playing a role in helping to hide material from enemies.

From Source:
Using cephalopods as their models, Hanlon, Rogers and their team
have produced basic pieces of synthetic cephalopod skin which,
when viewed close up, look like tiny black squares, each about
the size of a grain of salt. The pieces are in grids with each square
painted with a dye that changes from black to white and back again
with the introduction of heat from tiny heating elements. Underneath
each dye layer is a film of silver particles that reflect light entering
the skin through the dye.
The researchers have discovered that when they shine light on the
squares in the shape of letters, the all-black squares will mimic the
letters in white.

Commentary: Expect the military to get it first and then we get a tuned down version just like our current night vision which is what they used about 20 years ago.

Sources:
https://www.sciencealert.com/programmable-material-can-change-shape-and-colour-just-like-an-octopus
https://phys.org/news/2017-10-programmable-camouflaging-material-octopus-skin.html
The Silver Institute

Photo source: Market Business News