nice to see that alot of you guys read
not just look at the picture and start criticising
the answers are in the artical (that text next to the pic)
Q - "wow thats cool...i wonder if the views aren't overlapping tho..."
A - "One catch is that the images overlap if viewers stand right in front of the screen. Moving a few centimetres to the left or right may be necessary for a clear view."
Q- "First: you still dont here different sound"
A- "earphones"
or you can use the modern point sound systems that allow only parts of a room to hear the sounds using point and hear speakers