Silicon Valley startup Sabi is developing a brain-reading beanie that can turn internal speech into text, potentially allowing anyone to type without even touching a keyboard. The device, relying on EEG, could revolutionize how we interact with technology.

The technology's accuracy and user experience depend heavily on the number of sensors — Sabi’s cap will feature up to 100,000 sensors for pinpoint precision. However, decoding imagined speech presents unique challenges due to variability in neural signals between users.

Non-invasive wearables like this could become a reality if companies can standardize their devices and ensure they work consistently without calibration. Comfort and design will be key as these products move from the lab into our daily lives.

The rise of such technology also raises important questions about privacy, with Sabi taking steps to encrypt neural data and collaborate with neurosecurity experts to build secure systems.