Just yesterday, I installed “Lion” the new version of OS X from Apple, on my MacBook Pro.
And I love it! There are improvements to fundamental GUI usability, on both the software side & the human interface side. There are new view modes in the Finder (see Fig.1) Hand gestures such as three-finger-swipe make it super easy to intuitively navigate between running apps and widgets, for example (see Fig.2 & 3).This is NOT a why-bother upgrade.
This is not a panicky Windows security patch.
This is a totally-sweet, worth every penny of the (paltry) $29 price tag, direct from Apple power-upgrade to an already kick-ass operating system!
If you run Mac, if you have Snow-Leopard & dual core Intel blah blah, GET IT TODAY!!!