In the last article we talked about Xreal Air glasses and competitors. They look like sunglasses but when you put them on you can see a giant screen in the air a few feet in front of you, as if you're sitting in a movie theater. As promised, Lenovo just formally announced its own AR glasses, Lenovo Legion Glasses, on sale in October for $329. They're promoted as companions for Lenovo's portable gaming console but will display a large screen when plugged into other devices or computers, like the other AR glasses. They are single purpose devices. They can display a big screen for media...