Current brain-computer interfaces operate in one direction only. They're input-only devices that pick up neural signals from your brain and convert them into external actions — think controlling a cursor, typing commands, or operating a prosthetic limb. It's remarkable tech, yet fundamentally one-way communication.

But this is just the beginning. Looking ahead, the trajectory is clear: bidirectional BCIs are coming. Next-generation systems won't just read from the brain—they'll write to it. They'll send information back into neural tissue, creating true two-way dialogue between mind and machine. This capability will unlock possibilities we're only beginning to imagine. Sensory feedback, memory augmentation, direct brain-to-brain communication. The implications ripple through neuroscience, medicine, and human potential itself.