In the Review Project screen Future Tab, you can store the projects that got delayed, put on the side for a while or for which you decided to start the planning process in advance. It should not be confused with Someday/Maybe Items which are just thoughts you might do one day.
To add a project to the tab, use project cut and paste functionality.
When the project becomes current, you can cut and paste it to the Projects tab. You can also enter a Start date to the Future project to get the project moved automatically to the Projects tab when the Start date is reached or has passed (in case you don't run the application for a few days). The future project will be moved automatically to the Projects tab.
The actions under a Future project do not appear in the list of actions in the Review Actions screen. There is a report Future Projects to enable their review.