Here are some useful WMI queries for SCCM 2012 that you can use to create collections. Copy and paste these into the query statement of the query rule.
In this guide for System Center Configuration Manager 2012 I will show how to create a limiting device collection structure. We start with All Systems as root, and create one collection for all servers and one for all workstations.
Windows 8 is getting closer release. One of the new cool features I look forward to is Windows To Go. It is Windows 8 installed on a usb stick and works as a live-usb installation. This can be used to test Windows 8 in your environment without messing up your installation. But it has much more potential than that.