While I can see its merit for Facebook and the centralisation of the web by merging eCommerce with social media I feel like there comes a point where we have to say how much are we willing to give up to a private company for the sake of convenience.
We already have Google and Facebook centralising web traffic and choking off independents through really no fault of their own. Perhaps it does bring mass adoption and people eventually migrate to decentralised alternatives, we don't know.
Never the less an interesting development