There is a new device called Air Bar which instantly turns your normal display into a touch screen. It projects an invisible light field over your screen and your finger,pen or brush breaks the light and you can interact with the screen without actually touching it.
The best thing is you won’t require any extra hardware or software support, just plug it in via your existing USB port on your computer and attach the device just below the screen projecting the light upwards. Any PC using windows 8 or 10 automatically support this device, and according to them support for Mac’s is also coming.
This device is currently for a pre-order right now and will only cost you $49. So if you are really interested with this device, you can pre order now from http://air.bar/