Abstract: Systems, methods, devices and non-transitory, computer-readable storage mediums are disclosed for a wearable multimedia device and cloud computing platform with an application ecosystem for processing multimedia data captured by the wearable multimedia device. In an embodiment, a wearable multimedia device projects a virtual interface (VI) on a surface using a laser projector. Further, the device determines, based on sensor data from at least one of a camera or a depth sensor, a position of a first finger of the user relative to the surface. Further, the device, presents, using the VI, a first graphical element representing the position of the first finger of the user relative to the surface.