At 2 billion years older than Earth, I can't begin to imagine what kinds of things could possibly be living on this planet. Given, of course, that it's got the right ingredients for life to arise. What if it's suffered huge extinctions recently? What if there's a domineering species out to conquer the planet just like humans? What if there's a society there more sophisticated than us? It's a very exciting discovery.
If there was an intelligent life form, like humans, it would have expanded into the cosmos and colonized the entire galaxy within only a million years of developing technology. Since we don't see traces of them everywhere, we must presume they don't exist.
I sometimes wonder if "like humans" is the key. What if past some level of technical advancement, organisms cease inhabiting the same scale as us. Physically and temporaly; they become microscopic and perceive+act on a time scale faster than us by orders of magnitude. Why inhabit the days/hours/seconds timescale when you can have the same experiences in micro/nanoseconds? So we would be mostly not interesting to them and expensive to interact with at our timescale. Not sure if we would notice them right under our noses.