Could a version of this be implemented in Skyrim?
It needn't necessarily be done automatically, you could upload a version of your character when you felt it was presentable (choice of clothes, gear etc) and have it available in the official database.
Radiant could then place them appropriately in other player's games:
If the character were advanced in a particular guild you might find them training in their guild-hall. You might come across a Ranger's camp out in the wilds. You might meet them as a particularly tough barbarian in the arena. Or imagine if there were mercenaries for hire at the fighter's guild (hireable companions).
I was reading a post by another member bemoaning the possibility of countless NPCs with names like "traveler" or "merchant" on the roads, harnessing the creativity of all the other players is a perfect solution to this!
Imagine logging on to your account to see how many people had hired/killed/traded with your character, they might even develop their own fanbase. And there is something cool about knowing that other adventurers might meet your character on the road out there, even match blades with them. The more customisable our gear/character generation can be in Skyrim, the more effective a mechanic such as this would be.
Obviously they could not all be Dragonborn.