There's a negative consequence - If the line between life and non-life is blurry, that means there isn't a clear place for souls to fit in. If life can be completely explained as an emergent property of individual non-living parts, (ultimately, atoms aren't alive, even though they make up living things) then we can't tell whether souls exist in our universe or not.
This isn't a big deal for science, but it's a moral victory for atheists.