Given how NPCs are now far more reactive towards each other, I'm hoping the crime system will be decentralized. Since NPCs now take note of corpses, as an example, there'll probably be some alternative to psychic guards appearing to arrest the player. With what intent, I'm not sure. I personally want to see the court system of Daggerfall return - it had far more options and applications for character skill than the fines and compensation in MW/OB had. In sum, once taken to court, you could:
Plead Guilty: If you stand no apparent chance in outsmarting the court, being truthful to your crimes may get you a lesser prison sentence and won't smear your public reputation as badly.
Plead Not Guilty: This is a more dangerous choice if you fail to successfully negotiate with the court, however for intelligent and/or charismatic characters you could:
Debate: Derived from intelligence in Daggerfall, so it may have to be reworked in Skyrim.
Lie: Could be derived from your speechcraft skill in Skyrim, allowing you off the hook.
Guard parameters probably won't be fleshed out enough in their breadth and ken to really react differently in different cities, but it would be interesting if each city had a sort of "crime bias", where the minimum threshold for guards to begin actively pursuing you over your bounty would vary depending on the nature of the city. In an orderly and more aristocratic city, I would expect the guards not to really care about that pickpocket with a 10 gold bounty. You can come clean and pay it off to them, but it wouldn't be until you became a public enemy that they would chase after you. Conversely, committing paltry crimes in a city commandeered by rebels is probably the quickest way to get your hand chopped off.