2. Connecting Sites & Apps
Since Metro is a web-like interface, Mauceri points out it that "blurs the boundaries between the web and apps". This becomes apparent when using the Snap feature, which allows the screen to be shared by two apps. IE10 can take up the majority of the screen with a web page, while what looks like a sidebar can contain another app like Messaging or Mail.
While in IE10, the Charms that open on the right edge of the screen are supported, with Search using your default Internet search engine, Settings providing options for how the browser behaves, and Share sending "a rich link preview with image, description, and hyperlink" to apps like Mail that support it. The tiles for websites that are pinned to the Start screen can display dynamic information like notifications or messages if the website supports that feature.
3. Security & Privacy
IE10 uses the same security and privacy-related features that were included in IE9. This includes SmartScreen, XSS filtering, Application Reputation, InPrivate browsing, Tracking Protection, and hang detection and recovery. IE10 improves on InPrivate browsing by allowing it to be run on individual tabs, which prevents browsing in that browser tab from leaving behind any cached data, including history or cookies.