The OS X 10.9 Mavericks' successor is the subject of a lot of questions. Not on functionality but on its design. As for iOS 7 with his famous "flat design", many Apple's fans expect the same with OS X 10.10. Presumably to give it a facelift.
Here is a video from iTeck Concept and how they imagine the future OS X 10.10 with this famous "flat design".
What do you think?