Plus a lot of it has been about semantically correct formatting of your content and code. It's a moving target in that a lot of orgs try to "game the system",

Plus a lot of it has been about semantically correct formatting of your content and code. It's a moving target in that a lot of orgs try to "game the system", or at least exploit it as best they can :) Good content will mostly rise to the top because that's what search engines strive to optimise. Nothing really changes that much probably. Just semantics.