What I think will be the future.

1. No Main Levels. Instead, you pick a skill, and level it. The skills become available as part of a tech tree or as something externally acquired.
2. PvP based. Everyone is free to gank you wherever you are. Other features of the PvP climate includes dungeon invaders, you sign up with a party and defend/invade a dungeon to gank another party doing their dungeon quest; faction raids, an instance that will involve a massive raid upon an opposing faction.
3. Reputation based Your work with your faction improves your reputation with them, and you gain benefits, but your work against other factions create a negative reputation, that enables these factions to put a bounty on your head, collectible by another player who is going to hunt you.
4. Destroyable items, armor and houses. In order to feed the crafting and gathering economy.
5. Regional domination. Your decisive victories can lead your faction or guild to control an area.