We would love to have this feature added.

We create links and other asset types which are reused throughout the year. These assets at times will run for weeks and need to be taken down at specific times. However, they may also be needed after their initial takedown date. 

For now, this means that someone has to remember to disable the assets. Unfortunately, depending on our workload a good deal of time can pass before someone remembers that this needed to be done.

With the ability to schedule an unpublish time we would not have to worry about an asset being live on the site when it is no longer needed.