Those are blades, and they exist within the cloud family. I also think they look attractive, but we've gotten a lot of pushback from architects when we've tried

Those are blades, and they exist within the cloud family. I also think they look attractive, but we've gotten a lot of pushback from architects when we've tried to recommend them, excuses have included interference with lighting and sprinkler systems (I'm not an architect so I don't know how valid those concerns really are) and cost. As with most anything, it's probably easier to incorporate them into a new design from the start then to fit them into an existing space that wasn't designed to accommodate them.