Seems like an amazing entry-level offer for kids and students. But to be honest for myself I also don't really much added value of an Air or Pro anymore.
I think the memory of 8gb is the biggest limit for a device you want to use another 6-8 years, except for the most casual of users. Those who have multiple apps and tens of tabs open will enjoy an experience difference with 16gb Air/Pro. And the battery life is significantly (but not radically) better on the Air/Pro.
Really great to see.