The Mac Observer takes a very in depth look at OS X battery life from 10.6.8 thru the yet unreleased 10.8.2 developer build. The whole story is worth a look, especially if you've been unhappy with battery life since Mountain Lion was released.
The day after Apple released OS X 10.8 exclusively on the Mac App Store, Marco Arment has penned a very interesting post calling into question the long range prospects of the store. While I don't believe the present or future is quite as dire as Marco paints it, there are fundamental problems brewing that I hope Apple is pondering how to address.
Apple has made available the latest version of the Mac operating system. The upgrade is available for $19.99, exclusively from the Mac App Store.
Apple has selected a path of constant refinement in this latest OS release. Anyone familiar with OS X Lion, will immediately feel comfortable with the new release. What you'll notice is that everything has a more refined look and feel. It's noticeable everywhere from the Finder window to the renamed Calendar and Contacts apps. These refinements to bring the OS X apps more in line with their iOS counterparts, along with the increased strengthening of iCloud, will make this upgrade particularly attractive to iOS device users exploring the Mac as an option for their next computers.
Taken as a whole, it's a pretty compelling case.