ITRI touchscreen technology lets you pinch-to-zoom boob tubes of any size (video) –
This extra hardware will enable any screen to be a multi touch. from the little that it show, this hardware will need some calibration setup  and if you want to attach it to your tv , what application it will serve? but the real deal is , do you want to get out of your spot  to touch it?  remote is still a better option to me.