I agree, an f stop that low compared with a better lens array should give some great pics and be less grainy/noisy in low light too.
I'm intrigued to see the Siri thing working, my previous experience with voice commands haen't been great, but this looks amazying. Spending a lot of time in the car, having messages read out loud and being able to dictate messages is pretty special.
A bit gutted I have a year left on my contract, but at least OS5 will be a good improvement. Maybe my contract will expire in time for the 5!!