http://roboawesome.com/wp-content/uploads/2011/08/DarkElfFemale-1024x576.jpg are great but who wants to see the same breed of dog everywhere you go? Likewise with horses. I love the http://www.gamertheory.com/uploads/games/skyrim-horse.jpg they've been showing off but having to ride the same exact steed over and over could get repetitive...
My prediction is that we'll end up with huskies & wolfhounds of varying coat shades and the same horse build throughout Skyrim but just different colors ie Oblivion. If we're lucky, maybe the saddles, tails, and manes will change depending on which area of the map you buy them from. What do you think?