Important plot points are being established as we speak! You betcha that this'll all become important further down the line.
I realize that there hasn't been much of a technical description of how dreamwalking works. Or much about it at all. That'll change before this chapter of the story is over. I'm not saying that Chrys or her dad know all that much about dreamwalking... they don't... but it is something VERY important, even with the limited ability they have.