Apple claims the new release, OS X 10.9, will have deep improvements in battery life and finder tabs. Apple is also adding tagging, which will enhance search greatly and will be welcomed by power users.
In an on-stage demo by VP of Software Engineering Craig Federighi, you could see the power of tabs and tagging. Tags can appear in the finder sidebar, making this a very useful addition to OS X.
Multiple displays also got a lot of applause from the crowd. Spaces can be shown on any display, and an AirPlay-connected TV can act as a fully independent display. In a demo of the new feature, you could see the ease of moving assets around the screens, and it was impressive seeing an HDTV added as an extra display via an Apple TV.
Apple has also put a lot of thought into battery life and other advanced technologies. Mavericks is claimed to "intelligently align" interrupts, so CPUs can get up to a 72 percent boost in performance. Apple has also highlighted "Compressed Memory," a method of improving memory use on the fly.
That's just a bit of what is coming in OS X Mavericks. It looks to be a big leap over the current offerings, and seems focused on ease of use and performance. A beta version of OS X Mavericks will be available today for developers, while the final version will debut this fall. You can read more about OS X Mavericks on Apple's website.