This design looks like an iPad screen to me. Did the implications of Apple's stated mission to "make the Mac more like the iPad" not sink in? The iPad doesn't have draggable windows. And putting big title bars on a nondraggable window is a waste of pixels.
As for the critique of various shades of gray and nonscalable text and laggy performance: It is launch day, people. We are lucky the app works at all. (It apparently doesn't quite work for everyone; those bugs are going to need to be fixed first.) It is hell on earth to meet a Steve Jobs launch date, I'm grateful to all those who made it happen, and I'd like to encourage the rest of the peanut gallery to be patient and see if revision 1.0.1 brings some improvements.