I've been at Disneyland all week and my Pebble is on 40-50% battery (screen on the whole time, naturally). I knew it would last the whole time and then some, so never even took the charger.
Battery is my number one priority. I don't expect it to be the same priority for everyone, but I've had enough fun keeping two phones, a tablet, portable battery chargers and a camera charged up as it is!
I have a 5 in one USB charger but can just imagine how hotels are now struggling to keep up with the demands for power sockets as people now have another gadget to keep charged!