That sounds fair, but it seems would argue just as well for the boredom of being eternally in a 'state of peace', no other activities suggested. If this peace is forced upon you, isn't it just a forced eternal torpor?
And you've just shifted the problem of describing what is great about heaven to describing what is great about 'being in God's presence'. And I assume here you'd use words 'blissful', 'undescribable', etc. which are exactly the trouble words Orwell highlights.
I think what's missing here is the real perspective that hapiness is an evolutionary mechanism. All forms of contentment are made to get us to do things, be sucessful animals, reproduce as much as possible, etc. Some forms of displeasure are absolute (e.g. chronic pain), but most forms of hapiness are relative. It wouldn't be useful if hominids were in permanent depression for not having air conditioning in their huts or tasty food every meal. For nature it's ideal if you have a stable baseline that directs you toward achievable goals, and be neither permanently blissful or depressed.
That's not to say that, objectively, we couldn't come up with a pretty good scheme where people are actually healthy, happy and content a lot of the time, and which isn't entirely trivial. I have friends that more or less fit in that description. Some small problems colour their lives but generally they're in a pretty good state, compared to what I can imagine is achievable. Giving tem one bajillion dollars probably wouldn't change that state much, it could even make it a little worse by completely ridding them of problems.
By that I mean to say, there are things we can do to make the world better without getting into an actually miserable eventless existence. Physical pain, in particular chronic pain is an example of a bad state in an absolute sense. Total social isolation is equally bad. You can provide reasonably challenging work, etc. We also have plenty of depressed people with access to extremely favorable living conditions but lacking certain stimuli that makes us happy.
And I think we should strive for that environment. There's a possible conclusion from the essay that either we're going to reach a state of permanent, problem-free torpor from complete lack of resource constraint; or we'll have to force ourselves into a generally harsh lives with a few joys here and there.
I think this doesn't have to be a problem: I believe we can realize a future where everyone is in excellent health, with pretty good access to food and diverse sources of pleasure, entertainment, art, etc., have good social contact, is challenged at work or education, and which it is is fun and worthwhile. It doesn't need to last forever to be excellent. I'd merrily live for 1000 years in this world.
I make no claims about the necessarily political and economic systems to achieve this goal (and those are of no importance comparing to approaching it).