[dgently7]

in 3d we have "blinns law", someone else probably has a better definition but basically it says that we keep adding complexity and details to a scene until it takes about an hour to render a frame. that being about as long as any artist is willing to wait to see their work. so even though a computer today could render toy story 1 in faster than real time, toy story 5 probably rendered per frame as about the same amount of time as toy story 1.