The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at You Know, That Thing Where.
Could also be Hell of a Heaven.
Currently Working On: Incorruptible Pure Pureness
If we view the afterlife as one in which our cognition continues to develop, boredom can be averted but at the cost of preservation of terrestrial-life selfhood - you will probably have become quite a different person after a billion years of afterlife.
People generally do not give much thought to whether God will endow them with an altered level of intelligence when they reach Heaven - perhaps a reflection of the fact that most folks regard themselves as having ample stocks of common sense.
In Catholic teaching (but I am sure the same idea is present in different wording in many other religions) the afterlife activity of choice if one is lucky is the eternal beholding or contemplation of God. As a scientist I can interpret this as an all-encompassing understanding of the universe and its laws, and God had better give my future angel-me an enormous brain! But one can also interpret this in a diametrically opposite way, and assume that souls in the afterlife do very little by way of thinking and happily stare at the almighty for all of eternity.
Either way, the upshot is that both the very stupid and the very smart never get bored, albeit for different reasons; boredom in any of its forms is the hallmark of mediocrity.
But back to tropes: Eternal Happiness is forbidden by https://tvtropes.org/pmwiki/pmwiki.php/Main/RuleOfDrama
^ Er, yeah, we're talking about tropes here, not actual Religion.
Currently Working On: Incorruptible Pure Pureness
How can happiness last forever without growing tedious?