From a purely performance/usability front right now, they really only have two benefits. Actuation (button press vs lever press), and ease of installation/ability to move from bike to bike.
Right now they're super expensive. Even in the best case situation, we're talking about spreading the cost around multiple bikes (one dropper post in the same size seat tube on 4 bikes like someone above). But even if you take the price/4, its... about what it would be to have a good cable operated dropper ($200-300 per bike).
Cable operated dropper posts can be fiddly to setup, but IME once you've got it, you get seasons of use out of them without having to do much of anything to them (I mean, greasing the seal head, servicing them, but thats the same either way). Its just grab and go. I just don't want to have yet another thing to worry about charging.
Aesthetics is a different case, and if you're of the mind that its worth it to drop $850-1200 on a dropper post to get rid of one cable, go for it, and good for you for knowing what you want.