Live Site Tiles
On Windows 8, website tiles can be pinned to the Start screen, but they're static tiles. With IE11 on Windows 8.1, a website pinned to the Start screen can now be a live tile too, refreshing and displaying data from the site in real time. If you've a site with a web feed, you can even build a notification function into the tile. To build a site tile, you can go to www.buildmypinnedsite.com.
IE allows website owners to push content (via RSS) via a live tile.