They provide for our needs. They enable us to put food on the table and a roof over our heads. Grant yourself license to dream. Imagine that all of our physical needs are met. Replicators give us anything we want.
Interdimensional travel gives a world to every man, woman, and child.
Immortality gives us time to spare. When we answer every question of how to live, we will be left with the question of why we live. We probably won't find the answer in a spreadsheet or in the latest stock quotes. We might find the answer in a sunset, or a warm embrace, or laughter. We might find the answer in joy.