It doesn't change what we want, but it does change how likely we are to get it. Waiting additional centuries increases the probability of catastrophe significantly, be it a power outage or a nuclear war, as well as making it correspondingly harder to reintroduce yourself to society. And we don't actually have any reason to believe that if one is possible then the other is too - perhaps human technology will never get to the point of being able to map the brain perfectly and the only path to resurrection is with the same tissue, perhaps the tissue will be beyond repair and uploading will be the only viable option. Both are plausible.