I can't speak for Boxing Day but I can speak a bit about the consumerism of my own nation. As if five weeks of bacchanalia wasn't enough, immediately after the Holiday to end all Holidays (so far as the merchants seem to think) we are told that that isn't all. There's still bargains to have to slake your lust for ever more and ever newer baubles and bells. We lament the tax and spend tendency of government; we encourage an earn and spend mentality on our selves. I'm not sure the one's any better than the other.
Take a breath, America. You surely have everything you need and a great many things you simply want, and a great many of those unnecessary. Why not sit back on the 26th and enjoy all that? Revel in the wonderful times and even, yes, the nice things you got for Christmas. Be happy in your family and friends. Don't go after the Next Best Thing. There will always be another once you settle into that shallow mentality.
Take a breath. Enjoy the leftovers and seek more conversation, more interaction with your family and friends. WalMart and Best Buy won't go out of business if you don't taste of their wares today. You family and friends may of necessity go off on their own. Be with them now. Your computer simply can't be made made that much faster and the picture on your new TV can't be made that much clearer. But the rest will go all to quickly and all too certainly.