As the title says, I sincerely hope they release a Pc demo of Skyrim, so we can at least be sure our Pc can decently run it. I would go buy a good working Pc but I absolutely don't have the money, I'm pretty sure releasing demos is not completely alien to Bethesda, other than their recent games. It could begin from the beginning to where you exit the cave, and that should be the end of the demo. A suggestion that I think should, and I really hope is considered...

In order to see if it runs on your rig you could just research it at http://uesp.net/wiki/Skyrim:System_Requirements or other sites to confirm your settings. they wouldn`t need to release and pay for releasing a demo for system requirements.