London
The advocate's Devil.
Can be made with a shorter cylinder than traditional revolver cartridges, so the entire gun can be a little bit smaller.
Theoretically, sure, but imagine if they really did shorten the frame on this one to match up with the cylinder. If you think the gun's ugly now wait until you see the trigger guard sitting on the front of the frame. I would look almost as weird as a Nambu pistol or Dardick Tround. Holster selection would also be extremely limited.
There's a few reasons why auto-caliber revolvers don't really save any space.