I wrote a fairly long response to your post detailing the approaching singularity (our tools doing everything, even building and improving themselves), but it then occurred to me that addressing the utopian/dystopian perspective was more interesting.
I think the one inevitable mistake we always make when imagining the future is assuming we won't be affected individually and socially by the events along the way. Alternately, we tend to hold onto many positions/traditions that no longer make sense once we've "become" our future selves.
For instance, we (you and I right now) are immersed in a culture that often has trouble understanding its own social changes in the relatively recent past. In 1820s America, an overwhelmingly rural/agricultural society based very much on a combination of muscle-based labor and near-endless drudgery (think little house on the prairie with "Pa" wrangling a plow, hand sawing lumber etc. while "Ma", just to do "a load of laundry", physically hauled water, built a fire to heat it, gathered materials and made soap, then hand scrubbed, wrung, and hauled them all outside to hang on a line, only to bring them in later, build another fire to heat an iron, then iron and fold the clothes).
In that society, having lots of children meant "free" labor in many ways. Although I know I'll take grief for this, in that society it even made some sense to talk about "man's work" and "women's work". By the middle of that century, the actual changes that made those social "norms" useful were already well established. As people moved to the cities, the social forces changed dramatically, but social expectations certainly did not.
So, everything changed, but the people who moved to the cities. They had lots of children, Dad went off to work and Mom (who was usually pregnant) stayed home and did housework. Those children expected to be just like their parents in those ways--get married, have a passel of kids, Dad gets a job, and Mom is a homemaker.
Even a hundred and fifty years later we're still dealing with the social ramifications. It took many generations for the 2.3 children family to become common. We still haven't fully adjusted to the gender roles around labor.
The future folk living in a world without "need" are going to be different, but our biases probably make it impossible to understand just how different.
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