2. Pushed for Healthcare, Android lack the ability to safeguard patients' data since Android is open source and could be steal
3. ARKit is one of the many AR out there, still early to judge whether iOS can get AR wide adoption by developers, it's easy to develop while Androis flagships could work on AR using 3rd parties SDK seem not as smooth as ARKit without Tango enabled and need lot of testing on different devices than on iPad and iPhone.
4. Camera quality are subjective, Flickr have plenty to show creative photography. I always feel most flagships can take good and bad photos just like DSLR, if you don't know how, you are just an owner, not a photographer. Just like, you are just a player, not a professional.
HEIF is an awesome format which can recreate bokeh close to DSLR and other effects without a specialize hardware.