I think that Unity is the best UI example that I can imagine and my wish for Rhino. Because is super flexible (resizing and drag and drop), use components that you can populate, is super versatile (you can program it), do not change in that much alog time (only improve) and do not lose space (you can feel the gaps if you wish).
About a defoult Dak Sking Template, here is my feedback: [FEEDBACK] Rhino Dark Skin