Doesn't matter much to me, since I use a PS3. PC Skyrim is still more than I can afford, even once I get my PC going. And even if I could buy it, I find playing games on a keyboard is a vastly inferior experience than using a purpose-built game controller. It's kind of like using a PS3 controller to type replies, like I'm doing right now. It takes 5x longer, and I can't quote, use colored text, or add smilies.
If it's any consolation, the PC version of Skyrim does support the 360 controller for the PC.
That said, I personally prefer mouse + a gameboard [g13 or nostromo, personally g13], especially with SkyUI.