Well there will be a lot of cool things you will be able to do with them in the Fall
Once iCloud launches- you'll be able to sync calendars, mail, contacts, etc. instantly across the devices. You'll also be able to sync documents and such as well. Photos taken on your phone will automatically go into the cloud until you can fully import them into iPhoto.
In terms of movie editing- you will find Apple's iMovie application more than suits recreational needs.
For music- there is always iTunes, though I've recently gone the way of getting a spotify account. It is actually a legitimate iTunes replacement (IMO) for music mangement as it will auto add any local music you have stored. You can also sync any of your local music to the accompanying Spotify iPhone app wirelessly. That said any music you choose to listen to on spotify is stream only, has adds, and cannot be synced to your phone. If you want to be able to do that you can invest in a premium account.
HTH