The AirPods revision doesn't appear substantial; however, you'll notice in the image below that the charge status light has been moved from inside the case to the outside. This will likely allow users to check the charging status without needing to open the lid.
There may be other improvements but we'll need to wait until September 12th to learn more.
In addition to unearthing the new AirPods, the iOS 11 GM build has provide more details about the 'iPhone 8' and possibly leaked the new LTE Apple Watch. Follow iClarified on Twitter, Facebook, Google+, or RSS for updates.