It is true that we are supremely comfortable. It is true that we have an abundance of information. It is true that more people have more access to more wealth than ever if by "wealth" you mean how many things that were luxuries in previous generations have become commodities we can consume now, even if it's on credit and rent instead of ownership and entitlements.
But not everyone would value such things, nor the incentives and affordances new technologies provide. There are many poor aspects of our civilization such as greater neuroticism and strong pressures against our physical health flooding our environment since birth. Are these better problems to have than subsistence hunting? Maybe, but regardless they're still widespread and glaring and demonstrate that our utopia is based on tradeoffs.
Things that make human beings truly happy, like opportunities for compassionate service, large tight-knit families, natural environments to be physically active in, living space sufficient for privacy if necessary, moments of quiet for centering and concentration, easy access to healthy foods of moderate caloric density without having to fight temptation, consistently good sleep - all of these have become more difficult to attain relative to the attitudes and commitments required to maintain our current manner of civilization.
It is also an absurdum to use cavemen as a point of comparison. It would make the Dark Ages as much of a golden age as the Renaissance.