The biggest enhancement in this version of the app is its ability to utilize the higher resolutions of the iPad and of the iPhone 4's Retina display. This means that you can now use the entire display of the iPad as your NSN Connect workspace (as opposed to having to hit the 2x button and making the app bigger in a very unpleasant sort of way). It also means that those items you see on your irrigation machine will be crisper when you're using NSN Connect.
You may have thought that the way you moved around the app in previous versions seemed backwards when
compared to the rest of your iPhone. This is because it was. All the other apps in your iPhone use Apple's
collection of touch gestures to move and navigate around the app. This is why when you want to see the picture
that is to the right of the one you're looking at, you can just swipe your finger from the right to the left
to 'pull' that picture into view. In contrast, the NSN Connect app used a 'push' approach to push your
cursor around the irrigation screen.
This new version of the app now allows you to use the touch gestures that you're used to in the rest of the
iPhone. When you are connected to your irrigation machine, you can swipe your finger around the screen to
pull whatever you want to work with into view. Then when you touch something (say, the Rain Hold button),
you will see your arrow zoom to where ever you touched and will click on that point.
In general, the app has been cleaned and polished to give you more of a stable experience.