Change column header names dynamically in a table visual

Although this is an old post, I found myself here because I want to do something similar. I decided to do it manually by adding a "shape" visual, setting its text to a measure variable I created, setting the effects to have no background and no border, and placed over the top of the column heading that is already there.

A draw back is that the user cannot then click on the column heading to change sort order, but in my case that was not needed, so overlapping another visual over top of the column heading seemed to do the trick visually.