Techworld: IO2 Technology has released its Heliodisplay that projects a 2-dimensional mid-air display with up to 1024 x 1024 resolution. The image is convincingly 3-dimensional, and can be interactive, allowing a finger or hand to move images around in the air as if one were grabbing a virtual object or icon. An optical tracking system is used to detect finger or hand movements in the image and move the cursor correspondingly.