Everything already costs basically nothing. There's a Moore's Law for every industry, and if you go into mature industries you'll see how easily they ignore it. There's open collaboration to keep prices "stable" in most of them.
You can go buy decent t-shirts with no logos for €2.50 right now. And yet most people walk around with t-shirts that cost €10-50 with some logo on them.
This becomes apparent when you look at common food like potatoes, milk, cheese, bread etc. All the competition more or less provides the same product for about the same price. If they could go cheaper while still being profitable they would.