It's not like they're going to go around encouraging businesses not to migrate, but from the start the thinking was that after just moving to W7 they wouldn't w

It's not like they're going to go around encouraging businesses not to migrate, but from the start the thinking was that after just moving to W7 they wouldn't want to migrate anyway, that there was little short-term threat from desktop competitors, and that the long-term (or really medium-term) threat was from "consumerization of IT" and employees forming their expectations of how computing should work via iPhone etc. - so they decided W8 should be a heavily consumer-focused release.