Thanks, Nick. I’d agree and disagree by saying it could be immensely helpful for adaptive design (a range of fixed widths, for a lesser universe of known devices). As I understand responsive design these days, it’s all about ebb and flow; about design that works for devices that haven’t even been invented yet. In other words, even with media queries, there will always be guesswork. I suppose, though, even in an ebb-and-flow setting, it could be helpful to be able to specify the exact real-world dimensions of a given object. So I’ll agree with you in principle.