The guy is extremely vain and absolutely loved using his titles and demanding deference from others so this will be a massive blow to his fragile ego. Not real powers but there's still that.

In this country there's still loads of people who buy into the whole majestic nonsense of the royals. I was talking to my mother the other day who was saying how my grandmother was having a big rant about how they couldn't strip him of his titles as they're his birthright and how hard his mother, who protected him, worked etc.