Consumers continually say they want and use them, trusting some type of collective wisdom of folks willing to take time to give a review, assuming some honesty and relevance (reviewer has same needs, experience, and use pattern as I do for the item).
Yet, like price engines before them, consumer demand alone doesn't make success (some might also say that reviews are a feature, not a product, but table that for now).
From Zagat to Angie's list, the BBB in the US, TripAdvisor, yelp, 4square, plus a zillion others (along with on-site reviews powered by Bazaarvoice and others)... So many have come and gone. Amazon reviews are gamed, unclear what drives "Google Reviews", blog reviews have faded...
Did social kill them? Maybe, but the few people who respond to a "Hey, is X any good" on any forum or group seems less helpful than these past offerings.
I've wondered about these "come and gone" tools for a while, since price engines and reviews to leverage collective knowledge were hallmarks of internet 1.0 lore, and it seems like we failed at really delivering on those hopes. Still difficult to find the lowest price on items, and still difficult to get a clear read on product quality or value... And restaurants and other service offerings are still harder.
Any thoughts on what commerce model would work for reviews to be unbiased but collective, more than just the Consumer Reports model of few experts and some surveys?