Ben Rudolph from Windows Phone team just shared a video showing the new web based Windows Phone marketplace in action. You can see how to use it above. The pure magic happens when you click install on a app in the browser and after some moments the app appears in the installed app list in the phone. Windows Phone web marketplace sends a special message to our Windows Phones which automatically initiates the app installation. How cool ??
He also discussed about Internet sharing feature which can found under settings that lets you connect up to 5 devices at a time.
You can find more from Ben here.