Of all the exciting new features that must be contained in this release, I am most excited about Notification Center (finally) being ported to the desktop. It's kind of a sad thing to say, because Growl was for many years a fine notifications platform. However I always wondered why there was no standard provided by Apple. It didn't matter much until Growl's development took a radical new direction. No, I'm not referring to charging for the product, the app would have been worth the $2. But I am disgruntled about its bugginess and backwards-incompatibility. Presently Growl is crippled on my system. It works for apps that have updated to the new protocol. For others it doesn't. And it still suffers from bugs. So my hope is that Notification Center will prove to be a unifying standard for Mac apps.