The thing about the Singularity is, I don't even particularly not believe something like that could happen. I just think that -
A) It will take place much further in the future than is worth worrying about.
B) It will cause just as many problems as it solves.
I think this is the key to the change in paradigm...EVERYONE thinks things will advance slowly but surely over time OR disaster and we'll destroy ourselves. This misses the actual facts we can learn from history and the present...what we normally perceive in our limited way is not what is actually happening...this is where the implications for a more rapid accelerated change come into play.
Even if a Singularity creates a society that is post scarcity and and extremely advanced, I'd always hesitate to use the word "utopia". Would it be more positive than most people think, yes my opinion is it would be. If you ask for perfection, even if you could define it I'd have to say no.