Can you tell what it is yet?

I was not here for this lecture,
                                                but i have looked at the slides from the lecture and have noticed how much we have changed the way we now look at things for example, you take the old cave paintings from the cavemen which show they had limited knowledge on materals and worked with only what they had used before, Then you get todays work which we are going to see films in 3D, paintings that are so realistic you could get lost in them and we have a whole range of materials too, which has started from the cave men and we have learn't about since and experienced new ways.So thats what i basically picked up from the slides that were shown.
This word realism has grown over time to me as we are getting more and more realistic and in the chosen area i am studying means that people will be expecting more and more in the future for the wow factor for when they are looking at stuff designers have made.