Quite surprisingly, I can play the game on medium/high details with a good framerate, but I did notice that textures are not loaded properly at times. For instance it will load the textures near my starting point, but it will only load low res textures of nearby areas. I am not talking about LOD textures, just very low quality textures... Only fix this far has been quicksaving and quickloading. Reloading the area will fix it...locally. It will then show low res textures at some other place.
Now I did see a screenshot of the early leaks, where everything but a table was displayed in high res. Also, a German magazine was reporting that apparently there is a bug with texture loading and that it would ask Bethesda for further input.. Could it be that this is a bug? Or is it some kind of optimization for GPUs with too little VRAM?