I have only heard good reports about the 787's windows, from those who want to watch films, those who wish to sleep, and those (like me) who love to see our planet. I presume they makes life a lot easier for the Flight Attendants too, as they are the ones who have to face irritated passengers whatever they decide about the position of the blinds.
It seems to me to be a genuine advance in cabin design, but leaves me with a question...presumably there is a weight saving without all the blinds, but were dimming windows chosen to end the "Battle of the Blinds" or are there other advantages or reasons for the dimming windows?