Glow With the Show ears at World of Color legitimately did if you were lucky enough to be there a night when there was high participation (i.e. almost never). But these ain't that.
I highly doubt they'll need to be charged nightly. A Fitbit has about five days of battery life, and this has less functionality than a Fitbit.Personally I think they look cool, but I’m skeptical that the value of that, plus the limited extra functionality, is worth the extra cost + the inconvenience of having to recharge them nightly.
Even if they did, sticking a thing on charger takes exactly five seconds.
What's wrong with haptic feedback?Cool. Haptic feedback.