If we are ever going to go anywhere beyond our solar system we will have to somehow develop faster than light travel but one of the things that I didn`t notice any one address is the matter of slowing down after you once make light speed. On Star Trek they just drop out of warp and are suddenly travling at a slower speed, it seems to me that if you did that it would slam you into the windshield. So figuring out how to slow back down will probably be just as difficult to master as reaching speed.