Demonstrating responsive design to clients.  
Does not really work. Because it just renders stuff in an iframe. But actual devices behave quite differently. For example an ipad fools the website about its pixel size. So it renders very different from how its displayed here.For example meteor.com fits nicely into my ipad and even into my android phone. But this page makes it look like it does not fit at all.Also tried other sites and had the same effect. Sites that have no magic css/js to cope with different screen sizes or devices. They work on the devices and not on this website.