iOS 6 looks pretty good. I'm curious to see the new maps in action. Passbook will be a daily use item for me, as I tend to wander over to Starbucks and use the mobile app daily.

The new additions on the phone side should be useful too, especially the do not disturb setting. I've had a few junk calls wake me up over the past few months.

The new Siri features seem to be bringing back some features of the pre Apple Siri, so thats good to see.

And some fill in the gaps features I know some here are interested in, Mail is adding yet another way to add images, easier now from directly in the compose window. And Safari is adding the ability to upload photos to websites including this board.