There’s something very wrong about projection keyboards; emulating a device that should have been superceded by cooler input devices years ago seems like a bad use of clever technology to me.

However, later on in the document, it suggests other possible applications of this technology, these include: ‘projection notepads that track any pen, pencil or pen-like object; gestural interfaces for devices with inconvenient or ultra-small form-factors or locations (ie-wearable computers); and user identification and authentication through facial recognition’. Now that’s more like it.