Moto Labs presented a prototype of their Sensing Screen. The multi-touch prototype screen has a size of 19" but the technology is scalable up to 50" and beyond.
This recent prototype - a next iteration of labs’ Sensing Screen - promises effortless touch interaction, full multi-touch, a robust glass work surface, low stack height, with comparatively moderate cost. It does not utilize cameras or projection technology. This means that in production, this scalable technology could be very thin and very big. It could sit on legs like any table, or lay on a wall surface like any LCD panel.