It will indeed be interesting forever. You are looking at it from your limited finite mortal human point of view. We humans are so linear ( :-) ) When believers are transformed, they will be given new bodies and they will be made perfect in Christ. There will be no more tears, sorrow, pain, boredom or anything that relates to the fallen nature of this world and this mortal life.
See, that's my problem. You are changed extremely to not feel bored. The mind of an intelligent being wants to be challenged in order to not feel bored so whatever is done to your mind is not necessarily an enhancement.
It's similar to what happens to people after their brains are damaged in a certain way. They don't feel bored anymore since everything is new to them because after some time they simply forget what they just experienced. So for instance they can watch a movie again and again without feeling bored.
You claim that they are made perfect in Christ but this in no way explains how exactly your mind is changed and therefore it's just a meaningless phrase IMO. Oh, I know, you're altered in a way so you don't feel any boredom anymore. But there it is again this meaningless "in a way".