Some people knee-jerk against the prospect of a greatly extended healthy life by thinking of boredom - they can't imagine what they'd do with additional time. To my mind this fits well with the demographic who are ambivalent about being alive at all. To live a longer or shorter life will always be a choice, however. You won't have to undergo the rejuvenation therapies when they are available, just as you don't have to exercise, eat less, or otherwise maintain your health today: a shorter life is right there for the taking, if you feel so inclined. Here is a piece from io9 on the subject: "Some futurists predict that we'll be able to halt the aging process by the end of this century - if not sooner. The prospect of creating an ageless society is certainly not without its critics, with concerns ranging from the environmental right through to the spiritual. One of the most common objections to radical life extension, however, is the idea that it would be profoundly boring to live forever, and that by consequence, we should not even attempt it. So are the critics right? Let's take a closer look at the issue and consider both sides. To help us make sense of the problem, we spoke to two experts who have given this subject considerable thought: Bioethicist Nigel Cameron, the President of the Center for Policy on Emerging Technologies, and philosopher Mark A. Walker, Assistant Professor and Richard L. Hedden Chair of Advanced Philosophical Studies at New Mexico State University. It was through our conversations with them that we realized how difficult this question is to answer - mostly because no one has ever lived long enough to know. But given what's at stake, it's an issue that's certainly worth considering. Now, before we get into the discussion, there are a couple of things to note. First, this is not idle speculation. An increasing number of gerontologists, biologists, and futurists are predicting significant medical breakthroughs in the coming decades that could result in so-called 'negligible senescence' - the indefinite prolongation of healthy human life. And second, this discussion is limited to the question of boredom. Clearly, there are many other serious implications to radical life extension, but those are outside the scope of this article. Okay, let's do this thing."