You know, skinning is not dead. At least on Linux-based systems. Most desktop environments and window managers have switched to a whole new format of skinning though. One that came from the Internet, it's called CSS. Raster images are not required anymore, everything is described by code.
Maybe WindowBlinds can adopt that scheme and gradually switch to skin format that doesn't require any images at all (except if they are an absolute must). That way, many more people can start to participate in skinning and it will go through the renaissance.
(Although I must admit that I hate the living guts of Windows 10 UI, it looks like a placeholder for something much more beautiful, like Aero or even something under the codename "Longhorn Excalibur", which goes above and beyond Aero. I can only guess what kind of crazy UI that would be.)