If a new more intelligent and capable human species were to come into existence, it would likely lead to changes in how scientists classify and categorize different human species. The classification of humans, or any organisms, is based on their evolutionary relationships and characteristics. Currently, Homo sapiens (modern humans) are the only surviving species in the Homo genus.
If a new human species were to emerge with significantly different traits and capabilities, it would likely be classified as a new species within the Homo genus. The exact classification would depend on the extent of genetic and morphological differences between the new species and Homo sapiens.
Regarding Homo sapiens, if another more advanced human species were to exist alongside us, it's possible that our current species might be considered "modern humans" in the context of our time. The term "archaic humans" is typically used to refer to early human species that are now extinct, such as Homo neanderthalensis (Neanderthals) and Homo denisova (Denisovans). If Homo sapiens were to coexist with a more advanced species, the term "modern humans" might still be used to distinguish us from the new species, but it's challenging to predict the precise terminologies that future scientists would use.
It's worth noting that the process of classifying and naming new species is subject to scientific debate and consensus. Taxonomic classifications can be revised as new evidence and data become available. Furthermore, the concept of intelligence and capabilities can be complex and multifaceted, making it crucial for scientific research to consider multiple factors when categorizing human species.