expose viewport camera to (modifiers, shaders, geometry nodes)

I never use render view because its much faster to use the viewport camera. I want to be able to do simple things like set a track constraint and set the viewport camera as a lookat target. additional examples would include exposing camera position, rotation, and clipping planes to the shader and geometry nodes systems. same for modifiers.

my usecase is specific but im sure many users would get alot of use out of this feature, ive been wondering why it still hasnt been added all this time.