Although the video itself, entitled Carousel, is pretty phenomenal, the premise is strange. It's supposed to be selling us on the idea that you NEED 21:9 to see some films correctly. Not quite.
It's true, you'd fill up the entire Philips Ultra-Widescreen with picture on a 2.40:1 movie, but you're just exchanging having black bars on the top and bottom when you're watching movies with black bars on the side when you're watching TV. You don't actually "miss" any of the action.