I disagree.
The color options have already been tried (silver, space grey, gold,rose gold, matt black, jet black even red).very few people would be excited and rush to buy it because of a new color,it's a 4 years old body and majority of users have experienced at least one or two colors of this design.
no one thinks innovation means different look, and I didn't even mentioned word innovation.
the truth is the design of this phone is 4 years old and very out-dated now.no matter how much improvements they implement inside (actually they just slightly improved it to begin with nothing innovative with iPhone 8 really but thats a different subject) the outer design of the phone looks outdated comared to other top phones.
design and looks are as as important as the technology and features.specially with a brand like Apple,design is a core element.
when people see phones like Galaxy S8 and S8 Plus,and when they hear rumours and then confirmation of iPhone X which is a true upgrade both in design and in technology department , it's very natural that they have little or no interest in a slightly faster than old model in same old boring outdated body.
there is no way different colors could have changed that.
ps wireless charging is no Apple innovation and been there for ages used by others and camera upgrade is marginal improvements barely noticeable in real life and a very common and usual update in every cycles so one should be very easily pleased to get excited because these improvements alone in this day and age.