The latest Xbox One system update being rolled out today will for the first time let players purchase games on their phones and mobile devices through the free Smartglass app, as well as on Xbox.com. The games will automatically begin downloading upon purchase, so they're ready for play whenever you get back to your system, Microsoft says. Today's update also includes a few other useful additions, including a low battery indicator for wireless controllers and 3D Blu-Ray functionality. The activity feed has also been redesigned in a single-column view. Read the full list of updates over at Major Nelson's page.