Nothing romantic about the final scene but Julie was never a real person for Miller, just a means or a symbol. So, kissing an image of her makes sense, although it's still creepy as hell.
I'm just glad he and his terrible hair is gone, I'm assuming at least for a while (never read the source books, so I don't really know). This is scifi, so I expect some kind of protomlecule return.
What I want to know is What happened to the missiles?