I remember that it was a CGI movie and that it looked a lot similar to Ark and Final Fantasy: The Spirits Within. It had sort of a Science Fictiony and Steam-punkish story. There, humans lived in the air inside these like giant air balloons and the main character falls in love this girl who sorta like a pilot except she uses these wings on her back to fly. I don't remember much else but in the end it turns out that he was narrating the whole story as a really old man and that he has married the girl and after that is revealed you are in the guys first person vision and he looks in front of him and he sees a big rocket ship being made. If you don't know what movie this is, please tell me the names of other CGI movies like Kaena, Ark, or Final Fantasy: Spirits Within so I could possibly find it.