Here are some design notes when it comes to modern pergola designs. The most common pergola design is to have decorative and somewhat rounded ends on the beam. The easiest way of creating a more modern pergola is to do away with the decorative ends.
I love the little stepping stone path (maybe impractical?) and also the way the screens stop you seeing all the way down - draws your eye along path (could be a good way to distract attention from fence and wall?