If we used bitcoin as a payment maybe we cannot buy anything, but if we are going to used or convert bitcoin into fiat we can now buy everthing. So i think it is almost the same thing we can buy anything but we have to convert it first.
Well, that kind of defeats the purpose of having Bitcoin because you would lose out on a portion of the money with transfer fees. There's a lot of shops that already accept Bitcoin, the progress of more stores wanting to change their payment system moves very slowly.