We should really worry about Facebook entering the retail market, taking from Amazon a considerable number of consumers. I fear that one day, Facebook will have

We should really worry about Facebook entering the retail market, taking from Amazon a considerable number of consumers. I fear that one day, Facebook will have its own version of Amazon, where products are suggested based on the buying habits of the people you know. "Hey X, did you know that Y's birthday is in three days? You should consider buying Product A for her! Buy it now and we'll take off 20% AND throw in free shipping!!!" It's coming.