In this example, the clone tool was used to remove the hose and brush from the original photo. Just as with the marquee, the perspective is aligned as you clone over the converging lines of the deck board. Likewise, you can paint with the paintbrush, and your brush size adjusts to accommodate the vanishing perspective. The Vanishing Point feature can also be used non-destructively by working on a new layer.
My examples just barely scratch the surface of this tool. My review materials included a video, where Russell Brown demonstrated how this tool can be used to visualize a complete remodel of the exterior of a home, including new siding and trim, new windows, a new deck, and removal of a pool! (I haven't seen this video online yet, but if I do, I'll add a link.)