Details are still slim (how does this relate to SmartGlass?) but, as rumored, a Kinect-enabled Internet Explorer web browser will be released on Xbox 360 this year. You'll be able to select from your favorites using voice commands.
Microsoft answered a few of our questions about the Xbox's IE integration with an official blurb after its conference:
"With Kinect and Xbox SmartGlass, Internet Explorer for Xbox will allow you to surf the internet using your voice and navigate using your mobile devices for an incredibly easy web browsing experience optimized for your TV."