Maybe in Linux to a Linux programmer this is a reality, but not quite so to a Windows programmer. At least the way he understands it. Hence part of the barrier.

See in Win32 you have to do a few tricks to make a .scr file. There is a little bit involved in compiling it. [size=9px](I've played with it just a little bit some time ago. Enough to know it's not compile and go to make a Windows screensaver anyways.)[/size]

It very well may be simple and easy to do, but noone knows how to do it or how it's done. You have to cater to your audience not yourself. If you want to introduce something simple, but not commonplace knowledge, provide a tutorial or a demo and/or concept for others to see and follow.