Actually, I don't think adoption is particularly important. Really all we need is enough context to probabilistically figure out semantic meaning, and any metad

Actually, I don't think adoption is particularly important. Really all we need is enough context to probabilistically figure out semantic meaning, and any metadata helps with that. It's not like you need some top-down data schema. Google is already doing it this way already. I don't think semantic web technologies will do much more than make their work a little easier/more accurate.