In Pictures: Making the most of Windows 8 - the di...
Task Manager: An eye on consumption
Another Task Manager change, but for the more potentially useful, is that the App History tab in the expanded view of Task Manager lists Network and Metered network columns. If your Windows 8 device has both conventional broadband and cellular connectivity, those two columns let you see at a glance which types of network media are being consumed. This comes in handy if you have a Windows 8 device with a data plan and want to keep an eye on it.
In Pictures: Making the most of Windows 8 - the diehard's guide