It's been pointed out in the thread about those screenshots that the plants in the image don't really look that much better than Oblivion,
And yet both Morrowind and Oblivion were considered pretty graphically impressive when they were released, the reason why the graphics are not top of the line is not because of the kind of game it is or that Bethesda isn't focusing on that aspect of the game, it's that they're constrained by five year old hardware. Still, I can certainly live with the graphics as they are now, it's not like I expected Skyrim to be the next Crysis, but saying that graphics were never a major focus of the series is simply not true.
Skyrim is being praised graphically in every media outlet I've encountered. Personally, I think there's a bit of undue praise, but I'm just saying that nothing has really changed. If anything, that their game can still garner such praise in the age of Crysis, The Witcher 2, and RAGE, it's just indicative that either most of the "Graphical Purists" in the forum has no idea what they're talking about, or the media is looking beyond simple polygon counts, and at the bigger picture itself.
More than anything, I think Skyrim underscores the problem most people have with differentiating aesthetics and art, with graphics and technology. For example, The Witcher 2 has (for the most part, there are a few amazingly inspired bits) very weak art, and bland aesthetics, but very impressive graphical tech behind it. Skyrim has relatively weaker graphics technology, but much better art and aesthetic feel. RAGE combines both, though maybe ripping a little too much from Fallout, in terms of aesthetics.
I also think it's unfair how a lot of people assume a game built completely differently, that has better graphical tech than Skyrim, automatically means Skyrim is behind the curve though. How the world has to be drawn in Something like The Witcher 2, and Skyrim are entirely different, and applying the standards of one, to the other, is utterly unfair, and quite ignorant.