‘Bird’ is a tiny wearable device developed by an Israel-based startup, MUV Interactive that will let you interact with your wall and other surfaces through gestures & touch. Apart from touch, Bird will let users also interact with screens with gestures such as push, pull, drag & drop. It captures motion, proximity to even decode gestures, use them as inputs. Just project the screen on any surface, strap the device onto finger & ready to go.

https://www.gqindia.com/content/this-tiny-gadget-will-turn-your-wall-into-a-touchscreen-kind-of/#7am-at-the-gym