I'd say the majority of sites I visit look 100% the same as a year ago--of course about all I visit are forums and some news sites.
Only one's I can think of that have changed is maybe ESPN (may have been a year ago) and CNN (changed for the worse, don't visit there as much anymore).
But in any case, that's the issue for the sites. All I care about when buying a web surfing device is whether the sites I currently visit will currently display properly on it. Not whether they'll display properly on it down the road when sites change.