It wouldn't. You can already download and use Windows for free (without activating the product). Consumers, broadly, don't seem to be aware of this however and

It wouldn't. You can already download and use Windows for free (without activating the product). Consumers, broadly, don't seem to be aware of this however and the vast majority of consumer PC builds are sold through large builders that have Windows install deals with Microsoft (so there's no point for most people to use a non-activated copy of Windows).