The term “modern” orthodox can mean many different things to different people. To me it means you can not go back in time. The State of Israel is a reality. Most of us will have to earn a living in the modern marketplace.
We can not jump forward in time either. We have to live in this world and keep the Torah in this world. We were revealed a Torah for how we are to behave in this world. We were not revealed details of other worlds. We know that there is reward and punishment and eternity, but the details of the World to Come are a divine secret into which we are not allowed to probe.