A lot of interesting and exciting stuff but I don't think I'll be using much if any. I think I've done 1 facetime call; I don't have Apple Watch; the iPados stuff is nice but I never really implemented much of that on my iPhone.
Disappointed that iCloud size didn't change (or I missed that)
I would imagine using much of the new stuff would use a lot of battery and cell data.
I also think a lot of this will be very confusing to many and I would expect a small group to really take advantage of many of the new feature.
But time will tell