I'm sure most of the people who voted for Spears haven't played Mount&Blade or Red Dead Redemption. Proper Horses and Mounted Combat are an inevitability.
Funny thing, I play infantry in Mount&Blade. Not to mention spears/lances are pretty much an integral part of mounted combat.
Anyways, I never used mounts in Oblivion, for a few reasons. Those could very well change if they were implemented well and if Athletics was dropped as a skill.
However, I have a hard time imagining taking on monsters the likes of dragons without a spear or lance. Given the size of dragons, a sword or hammer would not be my first choice for fighting one.