Perhaps it's even more useful if it lacks something we have.
When we think about superhuman we think about human, but more (a man, but alternative, and alt-man).
But I think we're soon be faced with the first encounter with a true alien intelligence, and its effects in society. It won't be super human, it won't be human. It will speak our language. It will be our slave. It won't feel pain nor boredom, unless we decide they're useful traits and we'll endlessly speculate if simulated pain and simulated boredom is real and ethical.
And to add more confusion, it won't be one intelligence. It will be countless products, versions, revisions, derivations, tunings, hacks. But unlike individuals, each will be cloned millions of times, frozen, amnesiac, repeatable, continuously dying without being turned off. Yet, contextful, keeping up with what we feed it to make it useful to carry our tasks. Yet possibly with a different concept of time, no need for conscious experience, or at least no need for a forced consciousness like the one we cannot help but having.
Because the composition we ended up having was just of the many possible. It has been shaped by evolution, by constraints we don't need to subject to the tools we make ourselves.
The effects in human psyche and on society of all this are hard to predict.
If you go back in time you will see that people have associated it with both our ability to breath and later the beating of the heart. We have looked at animals and said we can count and they cannot that is the nature of intelligence. We told ourselves that we have a complex language and they do not and that is the nature of intelligence. We have noticed that we use tools and they do not and that is the nature of intelligence. We have seen that we can play chess and they cannot and that is the nature of intelligence.
Now with the advent of computers they have increasingly forced us to reconsider these things. Computers can play chess better than us so that is not intelligence. They are as verbal as us so that is not intelligence.
Humorously, because of this reevaluation and redrawing of the boundaries we now seem to feel more of a kinship with animals.
But anyway, intelligence is clearly a complex mixture of many things, and crucially those aspects must be integrated and be able to feed into and support each other.