Possible to do background replacement with parallax and a camera move?

I wasn't sure that AI would even be able to do this, yet, so I plugged it into Nano Banana 2 and, after keying the green manually, prompted: "Inpaint the black background to provide the correct perspective on a continuing cardboard city similar to that of the foreground." And it gave me a background plate that matched the style, lighting, texture, perspective of the foreground, and I am very surprised how well it just works, some quality and tweaks aside.