While it's always a plus to learn shaders, I wouldn't worry about the FFP issue. I believe Microsoft said that both Directx9 and Directx10 will be available at the same time on there new OS(that way most of the old programs are still supported). Unless your using an Directx10 based engine, there shouldn't be any cause for concern.

BTW - Where did you hear that FFP will no longer be supported?