After getting mine this afternoon and playing with it a bit, my impression is that it's a small evolution on the 9.7, which I had until a couple of days ago. Yes the screen is a bit bigger, but it doesn't seem way bigger or anything, just a bit. The scrolling and videos seem very smooth, and realizing that it is because of the new 120 hz, I noticed it, but if I hadn't known there was a new feature I'm not sure I would have really noticed it, its very subtle. The volume buttons seem more squished up at the very top, and maybe a bit smaller, which could be good or bad depending on how you use those.
The camera bump is a bit wider, but nothing that makes a real difference. Again, this seems like an evolution, some small things that made it a bit better. If I had kept the 9.7 knowing what I know now, I wouldn't be that disappointed, the differences aren't huge. Maybe people who play really taxing games or work with huge files might feel this is more necessary, but I think if you placed this and a 9.7 Pro next to each other in front of the average person, they would say "this one is like a half inch bigger, but otherwise what is the difference"- the other differences are subtle that only discerning Apple folks would notice.