I've been using my SP3 as my main PC. I have a Samsung all-in-one PC that has a touch capable display. I connect the SP3 to the Samsung and use the Samsung as an extended display. The display works fine. However, the touch capability doesn't work on the Samsung. I connect via HDMI to the Samsung. I also connected a USB cable to both - thinking that might send the necessary drivers. But no luck. Any suggestions?