I think it would be useful to be able to reset position and scale to the real-world size.
For example, I have imported a car exterior that I modeled in 3ds max as a reference mesh and I am sculpting the interior. Right now I have to constantly resize it to the 1:1 size (hard to estimate), and move it to the floor, but car is already modeled in meters and placed on the floor. I could lock reference with sculpt as usual and have a button that would reset the scale so I can see if everything fits well. Moving the world then would be also useful without rotating, since it is not real room-scale setup and I cannot walk around a car.
In addition, a Turntable option would be also useful for designing real-world objects like cars, furniture, or sculpting people, so the object is always standing on the floor (turntable) and we can spin it only on vertical axis and always have real scale and natural viewing angles.