I keep on hearing about a shadowglass or fibreglass or something trailer. I can haz link plz? (not e3 demo)
Xbox Smartglass is the words you are looking for I believe.
Yes, you are thinking of SmartGlass technology that will allow your iPhone, iPod touch, iPad, tablet pc, or Windows Phone to work with certain games, Halo 4 included, and give you additional tools, such as accepting and sending game invites from your phone, and seeing 3D models from the game.
Also, I just wanted to point out that your name is “A Moa Lover” and your first response was from “A Little Moa”. It made me smile.