Mostly grim, as it would require a colossal effort to not screw up everything forever.

On the other hand, if done right (and it IS possible), we indeed will get our utopia, but at two huge caveats.

First, homo sapiens will have little grand purpose other than self gratification, because AI will be able to do everything better.

Second, singularity will discover not just useful stuff, but SCP worth of horrors, and there will always be non-zero chance of their realisation without the very draconic control of advanced tech.

So, even our utopia will have the taste of futility and fear. Maybe we will just decide to reset the humanity, hidng all the tech, and letting new generations to relieve new cycle of history with the ense of purpose. Maybe it was already done.