It's the same game you have on PC, except without the improvements you can add to it yourself on PC. There aren't major, major improvements for Skyrim as there are for other Bethesda engine games (like New Vegas or Morrowind), but there are a ton of small ones that really add up (like horses that travel at a decent speed instead of the super slow vanilla ones that are barely faster than walking, or the ability to make books you haven't read glow in the dark, or even simply getting rid of over-encumbering).
