ipod was innovative for the common man.
iphone was innovative for the common man.
ipad was innovative for the common man.
The rest? Meh.
Nowadays it's just an upgrade treadmill, consisting of "To re-pair my old watch I first need to update to the latest watch software (even though it worked fine before I unpaired it). But to update the watch software I need to update my phone software to a higher version than it supports, so now I need a new phone, which now won't work with my computer unless I update that, but it doesn't support the latest OS so now I need to buy a new computer..." For want of a nail.