There are many missions on the drawing board for the future. A manned mission to Mars is being considered for early in the next century. Maybe one day the United States will return to the moon and establish a lunar base there. Private companies will be more of a factor in the exploration of space in the future. A new idea that has recently emerged is prize money for achieving a specified space goal.
Private companies have a different perspective than the government.
They can investigate new technologies and bring them to the citizens of the world and not just to astronauts. Someday in the future we will be able to travel to Japan in 90 minutes, and maybe even take a vacation on a space station. There are many new spacecraft under development. We will have to wait and see how the designs for these new spacecraft do.