What are Autonomous Cars?

In recent years, we often hear the term autonomous car being used.
Now, car manufacturers are developing autonomous cars with full use of their company's technology.
What kind of cars do you imagine they are?

A car that only runs on straight roads automatically? Or cars with no steering wheels that take you to your destination automatically when you tell it the address?
Actually, automatic driving cars are classified by their many functions.
We categorize these functions into what has already been realized, what can be realized in the near future, what has many problems to be realized before implementation and so on.

There are many steps before realizing complete autonomous driving.
We need to solve various problems.
If this can be realized, what kind of life we will have?