You know what I noticed that really gets to me? Bumping Christmas like this before Thanksgiving does kinda ruin the enjoyment of Christmas for one thing.
What makes the fall to early winter march of holidays is just that. The nice progression of one exciting holiday to look forward to to the next. You have Halloween, then Thanksgiving, then Christmas ending with New Year's. 3 solid months of something to look forward to before that boring as crap, waste of time month of January. I'll admit, since I've grown up, things are a little off... I can't trick or treat anymore (by a LONG shot), so Halloween isn't quite what it is, leaving the last three to feel wrong for some reason. But the main thing is, the other holidays build up the anticipation of Christmas. Now we're hyping up Christmas before Halloween, not letting the other holidays get their spotlight, and everything feels thrown off badly. So badly that Christmas doesn't feel right, and New Years feels like that sad last day of vacation where you have to pack up early because you have a long drive. you know, that day where you don't get to do anything unless it's on the way home.
It goes beyond the common putting too much into one day that leaves you just a little disappointed even though you know you shouldn't be. I'd say the anticipation is much more fun than the actual day, but too much anticipation doesn't make it special.
Now, I'll give it this. Having an extra month of shopping is a boon. Unless you want to get something that comes out inconveniently before Christmas, you'd be wise to start before the not really as good as they say they are sales before everything gets all crowded. Much like what happens with Back to School being almost before kids even get out of school, the retailers are expecting parents to spread out their shopping to save money. Also understandable. But we really don't need the Christmas Muzak they play in stores that early. Of course, Hallmark has always started the ornament reveal dates in Summer, yet they save the actual cards and everything else until later. I have to also relent to Christmas specific gift items popping up in stores early for early access. But you do NOT buy your tree (unless its artificial) until well after Thanksgiving because it'll turn into disgusting brown kindling by the time Christmas Eve comes.