Future perfect

I have 10 states left to visit, and then I will have visited all 50 states in the US.
By the time my grandson is 2 years old, I will have flown to Poland a dozen times (I hope!).
If I remain with the same company until I retire, I will have worked there for more than 40 years.
When my wife retires, she will have worked at the library for more than 20 years.
By the end of the week I will have walked down every street in my neighborhood this year.

By the time you read this I will have gone to work.