Apple had a technical conference on Monday to announce new things. If you have an iPhone it’s worth knowing something is coming down the pike so you are not surprised by it. After reading a quick synopsis I think the only thing of direct value to know from this is that in the new iOS 7 there is a new UI.
Why do you need to know and how will it help? You need to know because your daily access will change and the behaviors and locations of many things will change. How will it help? That’s not clear, but ultimately it is a cleaner design although if you’re an old hand it will just be a bit confusing for a little while until you get used to it.
All other features and newness are technical under the cover things that you may not notice. It’s my hope that it will improve the overall speed for you but don’t bet on it.