Jump lists have not only survived in Windows 8, but also evolved, while being tailored to fit Metro apps in addition to traditional desktop applications.

According to Marina Dukhon, a senior program manager lead on the Core Experience team, Microsoft built on the concept of Jump Lists in an attempt to adapt the feature to Metro style apps.

In Windows 7, Jump Lists were associated with items pinned to the Taskbar, including, but not limited to applications, and they functioned much like mini Start Menus.

Windows 8 Jump Lists for Metro Apps - Secondary Tiles - Softpedia

That's very cool. I imagine we will have live tiles of our Facebook feeds soon.