A “brick of light” – a segment of outside wall that is pierced with minuscule holes through which fiber optics bring the light from the outside. The holes are spread out on the outside, and converge to the inside of the house to a tight pattern, that diffuses external light to the inside.
An electronic bookmark allowing synchronization between a paper book and its ebook equivalent, as well as definitions lookup and search on the paper book.
An “assisted Unicycle” – a compact mode of urban transportation on a single wheel. Uses a reaction wheel for stability assistance ?
An intelligent mattress that would real-time modify is shape to best support the sleeper’s body 🙂