The Challenge of Getting a Usable QWERTY Keyboard Onto a Dime-sized Screen

An anonymous reader writes: Researchers from Spain and Germany are building on Carnegie Mellon's work to attempt to create workable text-input interfaces for wearables, smartwatches and a new breed of IoT devices too small to accomodate even the truncated soft keyboards familiar to phone users. In certain cases, the screen area in which the keyboard must be made usable is no bigger than a dime. Of all the commercial input systems I've used, Graffiti seems like it might be the most suited to such tiny surfaces.