Depends when you are planning your visit. During August/early September the Edinburgh Festival is on. You will see far stranger sights related to the plays and performances and street theatre so I doubt your kilt would be noticed at all!
It seems a pity that people in the UK are so rigid in their views about conformity. You'd have thought Scots would appreciate others wearing kilts, but unless it's to the football, sadly, my experience has been that there are few and far between.
Phil