From what I'm reading from what you are saying, is as long as someone can imagine a possibility to the origin of the universe, and we can't disprove it, it should be
accepted as a viable option.
They'll need to feature universal payment
options (not just Bitcoin) if they're going to be
accepted as a mainstream product, but
as long
as the vendors can assure all sides of the purchase (customer and store) that Bitcoin is a
viable alternative to the current implementation of credit and debit cards, shopping with the cryptocurrency could be a whole lot easier in just a few short years.