LabR@t said:in the video he moves the chains and the shadows move , hardly fixed objects?
No, but it's in a small cell with not much else to render. If they were an option they'd have to work without performance options anywhere, whether that's outdoor, in a room with hundreds of objects etc.
Seeing them work in a room with 2 or 3 objects is hardly indicitive of a "worse-case" scenario.