False.
Most people buy TES for computer. There was a poll about it here not too long ago and about 35% played on consoles I think.
Well, then, I guess no one told Bethesda that.
And in any case, the poll results on these forums don't represent Bethesda's potential customer base as a whole, they just represent the posters on these forums, whose opinions and preferences may or may not coincide with thay of the majority of potential customers. And you really don't need a poll to see that a lot of posters on these forums prefer to play their Elder Scrolls on PCs, if they play console games at all.
But I could very well believe that the screenshots were taken on the console versions, but I'm not sure how much difference it will make at this time. Sure, modern PCs may be able to support better graphics than current consoles, but will Bethesda take advantage of this? That waits to be seen. And will Bethesda make a different interface for the PC version? That's impossible to say right now, but given what we've seen before from them, I'm leaning towards "no" for the answer.