This simple patch just makes multi-object editing default behavior. So if you have multiple objects selected it will (probably) edit for all objects by default, or you can hold down ALT to affect only the active object. Basically the opposite of how it is now.
There has been much debate about this with the central concern of how to properly inform users of which properties do work with all objects and which can only work with active. This was last left with the idea that we needed a proper plan and design. But I don't think anyone has worked on one, nor are they likely to at the moment with "headless" UI Module.
My thought with this is that we could play with it and see what kind of problems are found in practice, how annoying it is, think about different ways to solve them. Personally I don't find much annoyance at all. The act of selecting multiple objects is very deliberate and so I am not surprised when changing "Rotation" changes that for all. Nor is it that devastating when changing "Dimensions" does not.
So more of a plaything and playground than an actual patch and feature.