The only major difference in multitasking for iOS 10 is that Safari will now let you view two websites in split screen. This is all done within the Safari app, as opposed to the usual slideover and split screen modes for combining apps.
App slideover and split screen still require the developer to include the ability in their app, however almost all productivity app developers have done this. At least the ones that are still actively supporting their apps.
Most of the other iOS 10 improvements are focused on the iPhone. There are a lot of them, and some affect both platforms; but none of them have a major impact on how the iPad and multitasking work. The biggest changes that affect the iPad are the new Messages app and how Notifications and Widgets are handled.
Other changes are going to take time to show, and won't be supper obvious. Apple has given developers more access to Siri. Certain classes of apps will be able to use Siri in the same way that Apple's app do. Like the multitasking, it's up to developers to implement the new features, so roll out will take sometime.
If you've got some time, you can always watch the event keynote.
Apple Events - Apple Special Events
One warning. Most Apple events end with a music performance. This time it's a bit odd. Even stranger than the bit of fun they have at the start.