I have been looking for a Joomla module like this for some time, and at last a great solution is here. An ingenious tool that has assisted me in showing/hiding AND dynamically re-assigning module positions based on browser width (aka 'rerouting' them). It has other functions too, which I have not explored yet. You may be excused for thinking, 'but I could do this with code', yes, but not only has this module saved me time by not having to, now when I update my template I don't have to redo all my custom work. So really pleased with this. And I was particularly pleased with the support too. I haven't written a review on here before, but this module expired me to. Looking forward to updates.