I've seen these pictures before and I remember trekking into the basement stacks of a remote library at my university to find this book by O'Neill.
One thing that strikes me about the artistic depictions is how verdant the landscapes are. These colonies aren't depicted as futuristic technological marvels but as natural or agricultural oases in the heavens, surrounding "idyllic" suburbia. In one picture there are even kids playing in a stream, surrounded by lush vegetation. It's an interesting choice.