To go back to the actual question and not a battle over definitions, the human race currently would not speciate due to our adaptions that become less and less apart of genetics as technology adapts for s. For example, if a group of lets say black labs were released into the arctic, if they manage to survive, they would develop a heavy coat of fur over many generations to adapt, humans however would not do the same, instead a human would build a shelter and obtain warm clothing and thus has a significantly less need to adapt. Due to technology becoming more and more readily available around the world, the need to adapt becomes less and less genetically and so speciation becomes less and less probable. Even if people were sent to an asteroid or something, they would probably just use technology to reconstruct there own environment and thus speciation doesn't appear to be in the future.