Kepler-452b has another fascinating characteristic: it's older than Earth. The star it orbits, Kepler-452, is approximately 1.5 billion years older than our sun, indicating that the star system is quite a bit older than our solar system.
According to planetary formation theory, planets form soon after their stars are born. This means that Kepler-452b is an older world, likely existing inside its star's habitable zone for 6 billion years. If there are life's ingredients* on Kepler-452b's surface, including a bountiful supply of liquid water and a life-supporting atmosphere, life could thrive on this world. Of course, the question of life is pure speculation -- we don't know if there's any water or even an atmosphere -- but it is a tantalizing thought.
*Life "as we know it", in any case.