Just curious...

In the new lighting system, we all know that the number of dynamic lights will be improved. But, when will things like self-shadowing be implemented, if at all?
Im not sure how accurate the light on models are rendered, cause I only have the Standard version for now, but how accurate are they? Is a polygon one color on its entire surface, or is each pixel rendered in relation to its distance from the lightsource, angle, etc, or is it rendered per-polygon?

I hope what I say makes sense.