Apple has announced Mac OS X 10.9 Mavericks at this mornings WWDC 2013 keynote. Stepping away from the big cats theme, the new version of OS X takes on a new California-based naming scheme. Key features in OS X Mavericks include a tabbed Finder, tagging, support for full-screen apps on multiple displays, and more. AirPlay connected HDTVs can even acts as full-on monitors as well now. There's also a new, lighter font used across the OS as well.
Other technologies include App Nap, which keeps active apps optimized and background apps still available without taking up precious resources. If an app is visible, it gets power, but if it is covered by other apps and running in the background, resources for that app are reduced. Timer Coalescing is a feature which reduces CPU utilization up to 72%, and compressed memory optimizes the inactive memory in your Mac to give it better performance.
Continue past the break for more on OS X Mavericks!