Another hope is that any flora inhabiting the clouds successfully integrate new DNA(?) allowing them to multiply and dwell at lower and lower heights (current estimates range from 30-40 km above surface for archaeans). This obviously pulls down more and more carbon and the greenhouse effect gets slowly tempered. As water is held in greater and greater amounts in cytoplasmata oceans are formed with microenvironments merging.
The gravity is already comparable to this earth's so why not plan a colony someday?