Humans would have to be weighed in a cost benefit analysis. We did create the machines after all. What else might we create given nurture and partnership with machine intelligences? The parts of humanity that lead to strife may also be the parts that drive us forward.
I find it funny that people think that machine sentiences will be like the angry gods of many religious texts. Most gods appear to have the personality of a 4 years old with the power of a star system.
Less doom and more optimism is needed or we may well cause the schism between meat and synthetics that some fear.