Significant redesign coming to Mac OS 10.10?

So says 9to5Mac:

http://9to5mac.com/2014/04/07/everything-to-know-about-ios-8-and-os-x-10-10-roundup-new-details/comment-page-1/#comment-171735

OS X 10.10 will be the successor to the current OS X, 10.9 Mavericks. Mavericks focused on power-user features and under-the-hood enhancements to improve hardware performance, battery life, and graphics processing. 10.10, however, will focus on aesthetics. According to sources, Apple Senior VP of Design Jony Ive is leading a "significant" design overhaul for OS X, and the new design will be the operating system’s cornerstone new feature (none of the mockups online, like the one above, are a good indicator of what to expect).

The new design will not be as stark as iOS 7, but it will include many of the flat elements and white textures instead of re-creations of life-like elements. The end-to-end redesign is said to be a top priority at Apple right now, with the specific details about the changes being sworn to extreme secrecy. Apple has been testing new features such as Siri and support for iOS AirDrop compatibility, but it’s unconfirmed if those enhancements will be ready for 10.10. We’ll have more on what to expect from OS X 10.10 soon, so stay tuned.