This is referred to as a "relaxed" Roman shade based on its slightly drooping look. A similar style, "London shade," has the same overall structure with the addition of two pleats, each a few inches inset from the left and right sides.
A few single Roman swoops used side by side on a long window create a dramatic look of multiple swoops and still allow each one to function independently. I love how they look over a kitchen sink.Browse more windows over the kitchen sink