There's evidence that soap has been around since Babylonian times. But to your point,...
Yes, it will evolve. As more and more ppl create wares to sell, and the competition increases, your only option is going to be increasing the quality of the product to keep your patrons. But that has a limited ceiling as well. So more than likely, it will create an industrial revolution. But I think a decentralized one, rather than the centralized monopolies of today.
I think of Jeff Booth here, when he says that all products will trend to the cost of production.