A solid-state amplifier is just one piece of the puzzle, of course. To actually create usable T-rays, you need a complete transceiver and antenna—and I don’t think DARPA is quite there yet. Still, the creation of transistors that are capable of switching at 1THz is exciting. This doesn’t mean that you’re going to magically start seeing computers that operate in the 1THz range—the power requirements and heat dissipation would be utterly insane—but we can at least begin to sketch a roadmap toward a future where everything, from computers and networks to surveillance and medical imaging, is supercharged well beyond what is currently possible.