The only explanation that makes sense of beauty is that we are created in the image of God who relishes it; a non-utilitarian God.
Better Than Our Best Days
I sometimes imagine that in heaven, one of the joys of living in eternity will be that we'll have the ability to re-live the best days and best memories from our earthly lives. But I know that in heaven, all these transient things (such as 24-hour periods we once called "days") will be quaint memories compared to the "eternal weight of glory beyond all comparison" we will be experiencing.