The thing about the peahen is is that she has not evolved to please the male. Because the male doesn't make any investment at all in the offspring. So, he'll mate with any peahen. Sure, he'll find all of them pretty, but the pressure is on him to be pleasing to the eye with evolutionary costly feathers (what do you think how easy those make it for predators?), while the peahen's beauty is rather subtle and evolved to keep her safe.
So, opposite of what people are like ... some women may like how men dress, but men don't dress to appeal to women.
Things are somewhat returning to their natural state, with men now taking more care of their appearance.
I do not think that wealth, power and aggressiveness are, in any way, displays for the woman's benefit. They are purely for other men. (Okay, the wealth might be to attract women, BUT it is wealth gained by exploiting women in patriarchy. It's cheating. It is not like the male eagle bringing the female food to prove his worth.)