Neonode AirBar is ingenious invention that turns any laptop screen into touchscreen. A simple USB strip that attached right under the laptop screen allows you to touch, pinch, swipe and zoom items at laptop screen. The technology in AirBar project an invisible light field on the screen that catches the hand gesture and send to laptop as commands. The plugin n play AirBar device uses no software and works well on both Windows and ChromeOS but functionalities on OSX are limited right now. All you’ve to do to make your regular laptop a touchscreen device is connect the AirBar($49) USB cable. Currently the AirBar is available for only 15.6-inch screens. Watch the video to understand how it works.
https://www.youtube.com/watch?v=p6VdbZxBoac