Spacetime is awesome channel, highly recommended. Getting very sciency at points, but I can still grasp basics when he explains.
3.3 will bring lots of structures in space we always wanted. They feel very good, and lot of them have interesting traffic and outlook (medicine facilities look actually planned and designed like hospitals, etc). As for 'pathethic' settlements on ground, they are huge. Considering amount of people living in space, they might be even too huge at some points.
As for gas giants and cities in gas clouds - I can totally see it happening, quite soon enough in fact (if technological advancements of 3.3 is any evidence). Gas mining stations, similar to stations we have in rings.