This looks pretty cool.  I’d love the view from the kitchen.  And there is great watersports potential (open ocean kiteboarding!).  But having lived at sea on large ships and underwater in the NOAA Aquarius Habitat, I can attest that though very cool, it isn’t the most comfortable experience (think wet, cold, bad food, rough, lots of fungal growth on your body, etc).  And would they still be called “skyscrapers”?

Read all about underwater skyscrapers here.