This was really super-easy for me to answer because Dell already said the stuff I was going to say:
I disagree with a map reset. There’s a lot of bigger, long-term builds going on right now, and no builder is going to put in the time and effort if they don’t think their work is going to stay for a good long while after they’re done. As it stands right now, there are no changes in the 1.4 update that can’t be supported in a 1.3 map, so why go through the pain of starting all over again from scratch? And if someone’s complaining that they’re bored, they should probably take a look at the vast stretches of map still unexplored and uninhabited. To me, there’s no good reason to reset, let’s keep a good thing going.
I should add that if you’re bored in Minecraft, it’s definitely not Minecraft’s fault.