For the last X versions of VS, to copy a watch value, I have to select Copy, and then paste the value (which is a combination of name, value, and type) into Notepad, and then from there, I copy the value I want to use elsewhere. The watch tooltip, on the otherhand, makes this process much more streamlined by providing "Copy Expression". Putting this into the Watch window proper will help quite a bit (especially since the tooltip tends to disappear if you move the mouse pointer too far as well as the fact that it is not always available)