Update: to see HRTP compared with the Skyrim HD mod, head here.
Today Bethesda released the High Resolution Texture Pack (HRTP) for the PC version of Skyrim. Naturally, we went about to test what differences can actually be observed, and came up with some interesting results and some screenshots to boot.
The screens below show the greatest differences. It must be noted not all textures in the game are improved; some are left stagnant (grass), and some are already of quite a high resolution as is (bridges). On the whole, though, the contrast, while it could always be greater, is much welcomed, particularly for the once blurry textures on clothing and trees, for example.
If you're into modding, the results seem to be about on par with what the community has done or greater, so you may want to just go the official route.
See for yourself (click to enlarge):