One big difference between online Vs offline retail shopping experience is its rating experience.
Why not retail shelves include a rating card for for all its items on shelf? Customers can view current rating and enter their rating.
It is challenging, but not impossible.
Some of the challenges
1. How to avoid duplicate rating ?
2. How to authenticate users?
(Adding Finger print based rating will solve both above problems. Again which finger? How sensitive is this finger print data? What are security/privacy implications? How to provide accessibility? )
But all these are solvable and fun to work on.
Background : I purchased a scrub in QFC (supposed to be better than the one we buy in costco), it cleans OK like in between steel scrub vs sponge scrub but thats where the goodness stops, it spoils everything it touches! For some reason it puts dirty marks on the sink and floor. If the same item is purchased in any online store, I might have read reviews/ratings and may not have purchased the same.