It appears that Apple found Yosemite's public beta testing to be successful, as the company today sent out an email that suggests it will continue to offer public beta tests for OS X software in the future



From MacRumors:

In an email that thanks Yosemite testers, Apple says that members of the OS X Beta Program will continue to be offered beta versions of OS X software updates. Thanks for participating in the OS X Yosemite Beta Program. As you know, OS X Yosemite brings an elegant redesign, continuity features for using your Mac, iPhone, and iPad together, and major enhancements to the apps you use every day. And it's now available for free from the Mac App Store.

  Apple to Continue Offering Public Beta Versions of OS X Software