"Well I didn't actually see the Matrix but I've seen other movies where with similar sorts of themes"

In this quote, Roger Penrose is making a contrast in between the Matrix and other films with comparable styles. He is indicating that although he has not seen the Matrix, he has actually seen other movies that have comparable themes and ideas. This recommends that he recognizes with the concept of the Matrix, even if he has not seen the movie itself. He is also indicating that the themes of the Matrix are not distinct, and that other motion pictures have actually explored comparable ideas. This could be analyzed as a criticism of the Matrix, as Penrose is recommending that it is not as original as it might have seemed. Alternatively, it might be seen as a compliment, as Penrose is suggesting that the Matrix is part of a bigger trend of movies exploring comparable styles.