Things dont usually change between iOS betas, but I have a feeling that iOS 7 still needs some design work before release. Mostly some of those icons and the reminders/notes apps. They just don't fit. Im pretty confident that despite what Ive said the icons we see now were thrown together pretty quick; Apple even had different icons then the ones that made it into the final b1 build on their website
That 73 degrees icon just might be live weather!