Also, Yootheme's decision to develop applications themselves really gives members the needed benefit to want to pay for the premium content. I know that for my projects I will definitely build with ZOO.
Apart from being able to easily layout pages with point and click ease, I can also provide my clients with a super simple update method that is easier and more functional than the conventional Joomla Article Manager.
As I continue to explore the possibilities, I am sure I will learn more about functionality of the program.
Only time will tell how functional Zoo becomes, but for it's initial release, this program is second to none.