> really bright colors in the top bars: that's exactly what we _don't_ want in desktop apps, as the focus is on the (changing) content, not the title bars
Bright colors serve as good visual anchors. If you have a lot of windows open, they can help you find the one you want to focus on, although in this case it'd be better if the user set the colors rather than the applications.
> Grab this http://quantum-os.github.io/images/desktop_layout_1.png, resize it to full screen, and you'll see what I mean.
You'll have to spell it out for me, because I don't :(
> large empty spaces: for me it's too much even on touch-based devices, but on the desktop it's just utter waste of real estate.
I agree that the information density is too poor. As long as there's a compact mode I'm good, but few app makers bother, even though it would be trivial to offer.
> I want the desktop to get less and less popular, so then the OS and app makers can start optimizing for people who create stuff (e.g. me), and it could look like http://i.imgur.com/7Tu2i6W.png or http://yxbenj.files.wordpress.com/2013/02/vs2012_colortheme_....
You know, if the desktop gets less and less popular, OS and app makers won't start optimizing for people like you. They will pack up and leave. These two screenshots show the current extent of the effort deployed to cater to power users, and I'm afraid they show their future extent as well.