...because I haven't connected my Xbox to the internet since I started playing Skyrim. What improvements should I expect when I get my internet turned on in a few days? What have they fixed/updated since 2011? --- My signature has been on vacation since 2008. Guess it's not coming back.
http://uesp.net/wiki/Skyrim:Patch Full patch list.
Here are some notable features that were added. UESP.net
Legendary difficulty setting Legendary Skills – Skills of 100 can be made Legendary. This will reset the skill to 15, reset all associated perks and refund their perk points, and allow the skill to affect leveling again. This effectively removes the overall level cap. New cinematic kill cameras for projectile weapons and spells. New kill moves and animations for melee weapons. Smithing skill increases now factor in the created item's value. Improved visual transition when going underwater. Mounted Combat - Skyrim now allows you to do melee and ranged combat while riding a horse.