A picture is worth a thousand words. And a movie is worth a thousand pictures (ok, we just made that up!). On a serious note, 3D animations are highly effective in ensuring that different stakeholders (management, engineering, shop floor, maintenance etc.) are on the same page.
It is far easier to communicate new concepts and ideas through a 3-D facility walk-through, rather than 2D drawings and schematics. The walk-through also facilitates offline training of new employees. Finally, if you are a supplier to OEMs, the animations serve as an excellent marketing tool to showcase your facility to customers.