Bitcoin is pretty nice for vendors: no need to integrate with third party services with complicated terms and regulations, no chargeback etc...

But from the client's perspective it's pretty crappy for basically the same reasons. In general if you want to impose a new payment system it's really the buying side that needs convincing. If tomorrow a significant portion of the population wants to buy good and services preferably with Bitcoins, that would drive adoption massively. Thing is, from a user experience standpoint cash and Visa and still vastly more convenient, so the vast amount of buyers won't want to bother with cryptocurrency at the moment.