After Carly posted about B&N’s iOS7 ‘warning’, I got several emails from app developers warning me about potential issues with apps and iOS7 that would be resolved with updates released soon. Getting these is a reminder that it is critical that you fully assess the potential impact of updating on the apps that are critical to your daily life.
So … unless you know your apps are all updated, or you only use Apple apps and basic functionality, then it might make sense to hold off for a bit.
Also, be sure to (always) back up before updating the OS of your device (!).