[ditoa]

While demoscene stuff is seriously impressive most are using a shit load of DirectX to do what they do in such a small size. They are not bare metal demos.

[kaoD]

Obviously. You can't program the GPU without driver interfaces (DX/OGL).

  (DirectX + 4kb) vs. (OpenGL + Python + Pyglet + 500LOC)
  =
  4kb vs. (Python + Pyglet + 500LOC)

Long are gone the days when you could manage the framebuffer yourself :) Specially if you want to run the demo in modern OSes.