Surely they'll have a system where you can leave them at a hitching post or a stable.

Umm.....lolz?

Mounted combat would be awesome! I have always thought it would fit in with TES nicely. I wonder how much time, if any, Beth is willing to spend on it though. If it isn't done right, it would end up being more of a liability. No doubt Beth could pull it off if any one could though. I have faith in them.