Hm, maybe someone asked this before, but I wasn't able to find a post about it, so ... here we go:
I wonder if SFML will bring support for drawing simple stuff like lines, rectangles, ellipses, splines and paths.
The GDI+ API seems to be pretty powerful and a lot of people like it because of it's simplicity. However, it is not hardware accelerated and maybe SFML could fix this issue. Transfer the powerful GDI+ API to SFML and I would not see a better 2D library out there!