Well if the accuracy is 95% why not turn all Facebook users into one huge mechanical turk batch process to get to 99.9%? And it's just convenient for people not

Well if the accuracy is 95% why not turn all Facebook users into one huge mechanical turk batch process to get to 99.9%? And it's just convenient for people not to have to tag. Then you have the data sitting around for mapping the insides of all buildings like Google has it for street view. Sure your Asimo-style robot butler/"something really BIG" will be that more efficient with internal mappings of most public spaces when you release it in 2030, but the convenience is sufficient. Remember that Facebook beat Myspace more or less on interface (combined with a few other factors like exclusivity), they aren't going to let Google or some other competitor get ahead of them by having an interface convenience edge of 5-10% which might cause a Myspace-to-Facebook style exodus. Kings who have committed regicide on their predecessor are all too aware of how they got into power.