DSE 2014: ViewSonic Demos 84-Inch Interactive Whiteboard Panel With 4K, Six-Point TouchFebruary 13, 2014 | Home / February 13, 2014 rave-video / DSE 2014: ViewSonic Demos 84-Inch Interactive Whiteboard Panel With 4K, Six-Point Touch DSE 2014: ViewSonic Demos 84-Inch Interactive Whiteboard Panel With 4K, Six-Point Touch