Some of the other demos given during the keynote look similarly impressive. A tower defense game, for instance, is played by multiple people slapping AR bad guys off of a real table in the physical world. Another demo showed an image of a real room filled with virtual objects like water and bouncey balls, which react to objects in the room. You can also see other Facebook tech baked into the demos, like the ability to shop for a product you see by simply clicking on it. This kind of AR tech is also a big talking point for Samsung and its new virtual assistant Bixby, which is built into the Galaxy S8 smartphone.