Lenovo is revealing yet another multi-touch all in one unit. This one is called the IdeaCentre A520. This 23-inch IPS display is 0.8 inches thick, offers a 1920 x 1080 resolution and supports ten-finger multitouch running Windows 8. In addition, it has HDMI-in and HDMI-out ports as well as USB 3.0 and USB 2.0...