Yes, this looks like DNT all over again. Just another header that quickly becomes meaningless, wasting terabytes of bandwidth all over the world for no good reason.
DNT does nothing technically, but it has political power and that's where privacy happens to a great degree. When 70% of users say 'do not track me', it is hard to claim that they don't care about privacy.
It was meaningless from the beginning: DNT was always nothing but an Evil Bit. You’re getting mad at Microsoft for pointing out that the emperor had no clothes.