I wish this would have been a year or two ago. I would have replaced my iPad2. It just sits on a shelf being unused. My family moved on. Wife on Fire HD, youngest on Chromebook, oldest will only use her iPhone, and I'm on N7 and S5.
I've had different thoughts as to why Apple waited so long to build this. Was the tech too immature in 2012/13? I personally don't think so, but I'm no expert. Jadedly, I think the profit margins are finally right. Either way, it was a missed opportunity for Apple to dig a little further into my wallet. They're getting an iPhone 6 out of me for my oldest, but nothing else since the mac mini was abominated (personal opinion)😡. The Air2 and Nexus 9 seem to be great tablets. I just don't want one anymore. Maybe if the Air3 gets speakers like the N9 I might be tempted (stereo speakers should have been a no brainer).