Looks like ArcGIS 10.2 is out. If you look at the installation instructions for Desktop, there is good news if you are currently running 10.1 … no uninstall/reinstall ! The setup package detects your 10.1 install and upgrades it to 10.2. If you use the License Manager for concurrent use licenses, make sure to upgrade that first. Some more good news … your current 10.1 authorizations will be preserved and reconfigured for 10.2 use. No need to generate new authorization files.
After installation, any customizations, add-ons, or third-party applications installed for 10.1 must be reapplied to 10.2.