No we don't, and no it's not. At least not as far as the mass consumer is concerned.
Show me where a consumer can walk into Best Buy and purchase a PC with a decently powerful and inexpensive ARM processor powering it in place of Intel or AMD. That's something that Nvidia can actually make happen given its resources. The organization behind the Raspberry PI is microscopic by comparison, they have no resources to manage such an enormous consumer front (not even remotely close in fact).
Your premise about the Raspberry PI is like techies on HN pretending that there's no need for x y z product/service, because you can just run your own social network on a machine in your closet at home, you can just run your own file server, you can just run your own mail server. No, consumers are never going to do that en masse. And consumers are never going to lean on the Raspberry PI to assemble their own machines either in massive quantities; that has to be a comprehensive, packaged product sold to them via retail that they plug in and use with zero assembly or hands-on customization required. It has to be relatively inexpensive and powerful enough to undercut and compete with what Intel and AMD bring to the table. Raspberry PI isn't even in the discussion.