No matter how good the game is, none could ever reach such a perfection as to cause a noticeable ripple.
This.
While I think Skyrim will be a great game and RPG, I don't think it'll be the bestest RPG to have ever RPG-ed before in the history of RPGs. Something tells me that it won't be able to beat some of the well renown classics, and even if it does, we don't know what the future has in store for RPGs. For all we know, Skyrim could be nothing compared to RPGs 5-20 years from now. Perhaps even longer, or shorter, than that.
With the way graphics are advancing, ES VI may look like this: http://i.imgur.com/Wn97m.png
To be honest, I don't see this happening for awhile. At least until hardware is able to meet up with the theoretical requirements of http://en.wikipedia.org/wiki/Id_Tech_6, which will combine both raster graphics (what we use now) and http://en.wikipedia.org/wiki/Ray_tracing_(graphics) (which is as photorealistic as 3D graphics can get). And according to Carmack himself, the hardware capable of handling it may not be around even in the next generation.
One can only dream, though.