What is the difference between Israel's role and the church's role in the future kingdom?
The church, the Body of Christ, will rule in the heavenlies, while Israel will have the earth. The church's role is heavenly, ruling outer space, and Israel's role is earthly. The millennial earth is given to Israel, and the church will reign in the heavenlies with resurrected bodies.
Les explains that the church age believer, the Body of Christ, is told they will rule the heavenlies. Israel is going to have the earth, and the church will give them that. So there is a distinction: the church rules in the heavenlies, while Israel's domain is the earth. There will also be a certain amount of interfacing between those in resurrected bodies and the millennial citizens who will be in flesh and blood. There are areas of reward for every believer to work for, though salvation itself is a gift, not earned by works.