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The "Vorta Command" headset
First shown in Star Trek: Deep Space Nine, the command headset employed by the Dominion "Vorta" overseers of the brutal Jem'Hadar forces was used to have complete situational awareness while piloting their attack ships.
Today, we know this product as Google Glass.
One of the most awe-inspiring technologies that has been in every single one of the Star Trek series has been the "Replicator," a device that is able to produce any object, of any complexity, either inorganic or organic in nature, whether it be food or machines, purely by combining raw matter and energy from patterns stored in the computer and re-arranging particles at a sub-atomic level.
In Star Trek, the "Replicator" was an offshoot of the "Transporter" technology that allowed for de-materialization and re-materialization of objects and beings at vast distances.
While this sort of power over pure matter and energy is probably hundreds, if not thousands, of years beyond our current reach, the "Replicator" is here in a much more primitive form as the 3D printer, which can produce fairly complex objects for rapid prototype and manufacture using any number of materials, including plastics, metals, and also proteins and other organic substances.