Meet AirBar: an innovative system that brings touch gestures to your existing PCs without you having to a major upgrade. It projects an invisible light field on the surface of your display, allowing you to perform Windows 8 and 10 gestures no matter what you are wearing.
To get started, mount the bar from edge to edge and plug it into a USB port. The bar is attached with a magnetic strip, so you can remove it easily. AirBar for 15.6″ screens is going for $49 for pre-order.