Light, like anything else, travels at a finite speed. So when we look up at the stars, we're seeing light that left those stars a long time ago and traveled a long distance since. Well, the nearest star other than our own sun is Proxima Centauri, which is 40,000,000,000,000 kilometers away. Light from that star takes over four years to reach us, so we say it's four light-years distant from Earth. So when we look up and see Proxima Centauri, we are seeing it as it was over four years ago.
Most stars are much farther away than that.
That means we're seeing it as it was 12 billion years ago, and have no clue what it is like now. At that point, the question will be moot as far as you and I are concerned. This is true even of our own sun. It takes several minutes for light from the sun to reach Earth. If the sun winked out tomorrow at 5 a.m., we wouldn't know it right away.