Furthermore if you play Skyrim at a typical MMORPG rate of over 20 hours per week, 100 hours per month, there is a good chance that the Skyrim buzz will be over in a month. The question "Skyrim or SWTOR" won't pose itself, because by the time SWTOR is out, Skyrim might already be yesterday's news.
What do you think about the size of Skyrim, it's replayability? How many months do you think you will play the game? How does it compare in size to a typical MMORPG?