I don't know if it's just lack of imagination or people don't understand the concept of A.R. So let me paint you a picture.
Disclaimer: I'm not saying this is what Apple Glass will do, at least not for a while. But eventually I believe all A.R. systems will do this.
Your glasses are lying upside down on your bedside table, the front of the lenses show the time. Two numbers in each lens. 07 30. It's 7:30(AM) and the lenses start flashing and making a sound. You touch them and they snooze for another five minutes until they go off again. Finally you wake up, rub your eyes, put the glasses on and the alarm goes silent. You get out of bed. As you're walking you make a small gesture with your hand (two taps of your middle finger and your thumb) and a menu pops up with a list of all your applications, objects, notifications, settings, etc. You pop open the browser window you were using last night. It opens as a fifteen inch screen in front of you. Vertically aligned. Floating in front of you as a walk. Just to your lower right. Near your right hand. You scroll through the news to see what's going on and find a video you might want to watch as you walk in the living room. It starts playing in the browser window in the middle of the article. You pause it. You tap your fingers and pull your menu up again. Grab a TV object and throw it on your living room wall. Pinch to zoom it up to about eighty inches in size. Then you grab the video from your browser window and drag it to your TV object now on your living room wall. Unpause the video and plays. You walk away to the kitchen. The TV object stays on the wall in your living room playing the video as your browser window follows in front of you until you minimize it to your dock, in your menu.
You walk into the kitchen and start making some breakfast. You can easily hear the TV in the other room, because the speakers are on the stems of the glasses you're wearing. No one else sleeping in the house can hear it or see it. You grab what you're eating, walk back into the living room. Sit down on the couch, TV object in front of you playing the video. You pull your browser window back up, center it in front of you, maybe pull up some other apps to throw off to the side and cycle through them. Suddenly a tiny window pops up, someone is calling. You hit ignore. It's too early for that.
If we stopped here, I would be sold. Just replacing my laptop, TV and smartphone with an all-in-one portable device would be enough. But of course A.R. has to the potential to be so much more than that.