Sorry, not gonna fly. Back in the 90s everyone offered web-hosting, and technically-savvy people could create websites, anyone knows angelfire, tripod, geocities? They were big in the 90s, now you probably have to search really hard to find anyone familiar with those web-services. You know why? In the 2000s blogging sites appeared, which, in essence, killed the personal websites industry. Because it's thousands of times easier to set up and maintain a blog than it is to set up and maintain a website. We now have ebay to sell and buy stuff from other people. The spec is a step backwards: it's made with the idea that a merchant would want to create a website, manage it, process transactions etc. The merchant only wants to sell her product. That's all.
This can still be used by the vast number of merchants or companies who do have a website. Those who don't can use a plugin on their blog, webstore or social networking site.
This whole policy thing, as I see it, is meant only for one thing: ease the job of the spider. And there aren't any spiders yet. Registering a standard before creating an implementation of it is just plain wrong.
It's not wrong. We're developing here.
