Essentially, that. Generally read to indicate an ascension to heaven: but think about that. Eternal life in heaven, yes, better than Hell, but so's being locked in a room and being forced to listen to Fred Phelps for all eternity. But what actually is heaven?
I've seen some suggestions, working under the assumption 'eternal life' includes consciousness, as otherwise it's hardly life.
The main one appears to be progressive time, like the greatest university. You can learn all there is to know, read all there is to read, etc etc. Even assuming the laws of heaven put no limits on your entertainment, it's eternal. You could learn all you want to learn, read every book, memorize every word in every book or film or textbook, fully understand the meaning behind every turn of phrase, every tiny expression, every equation in science, and be able to solve any question (mathematical, logical...) in a split second from so much practise. You could learn every possible mathematical question, and learn every answer, and you could count to infinity, including decimal numbers, a billion times over. And there would still be an eternity to go.
Any kind of eternal life seems like it would eventually become a hell. You could do everything conceivable trillions upon trillions of times, until you've memorized every possible eventuality, and could guess what would happen before you even do it. There'd still be more time to spend in 'heaven'.
People also focus on the horrors of Hell: they never do the same for heaven.
I believe Good Omens (by Terry Pratchett and Neil Gaiman) has a fitting quote: (paraphrased)
"There's this big mountain, a mile high, at the end of the universe, and once every thousand years there's this little bird that flies (or limps as it would be pretty old) and sharpens its beak on the mountain. And then it flies back (possibly in a space ship), until a thousand years later, it does it all again. When the bird has worn the mountain down to nothing, then you still won't be finished watching The Sound of Music."
