As handset makers continue to work on ways of making smartphones more streamlined and sleek, while at the same time introducing new features that will get people buying more devices, a startup that is pioneering something called “software-defined” surfaces — essentially, using ultrasound and AI to turn any kind of material, and any kind of surface, into one that will respond to gestures, touch and other forces — is setting out its stall to help them and other hardware makers change up the game.
