7. Subdermal LEDs
Okay, so these implants don't exactly do anything, but what's the point of being a cyborg if you can't look like one? Grindhouse Wetware biohackers implanted this LED device under their skin to emulate bioluminescence seen in the natural world. The device, which is about the size of a £2 coin, is activated using magnets and can be used to illuminate tattoos or just look generall badass. Because the procedure is not endorsed by the medical profession, it is performed by tattoo artists and body modification experts without anaesthetic - that's certainly dedication to the cause. The company is also working on a variety of models with different capabilities, including Bluetooth that could be used to control devices with gestures. These will eventually filter down the market, but for now we can at least pretend that we're Tony Stark.