Beautifully said. Elton John sings, "there's more to be seen than can ever be seen, more to do than can ever be done". As long as there are more things to discover, life is a proposition worth having.

Though, not to be a wet blanket, even the computers, trans-human intelligences, etc. won't be "immortal" in the sense of living forever. The universe herself will expand so much that her galaxies will all collapse into mega-black holes, which, over the eons, will decay via Hawking radiation, until there will be nothing at all anywhere except photons, at which point time itself will cease since there will be no material particles to measure it, time effectively becomes spacelike at that point.

But between now and that doubtful date, I do wish the transhumanists and their robot companions all the best of luck! :-)