I'm hardly convinced this new line will drive Apple to improve their "stagnating" iPad line. There's no innovation in the first place. This is just a new line of Surface tablets at lower price points and with lower specs for that matter.
It's a full fledged desktop OS with great user experience on a tablet, combined with a usable mechanical keyboard and a working stylus. We never had such a device before.
The iPad has not seen anything new since the introduction of the retina display and iOS is really lacking productivity features.