Where do you see strings? All I see is a tiled wall. The motion could be consistent with gyro stabilization. But there doesn't seem to be room for the size inertia wheel that would be required. Just the battery size to run the suction cups and an inertial wheel would be impressive if the life was intended to cover a normal length movie. So might not be dodgy, but certainly doesn't seem practical. Kind of like those gyro stabilized two wheel or even mono wheeled cars. They work, but are complicated, expensive solutions for a not very real problem.