Increasing Precision
A major disadvantage of 3D UIs based on spatial tracking systems is the difficulty of providing precise 3D spatial input. The modern mouse is a highly precise, accurate, and responsive 2D spatial input device—users can point at on-screen elements, even individual pixels, quickly and accurately. 3D spatial tracking systems are far behind the mouse in terms of precision (jitter), accuracy of reported values, and responsiveness (latency), making it problematic to use them for tasks requiring precision (Teather et al., 2009).