See, I remember your thread, and I think that poster had a point.
Had to search for it, but confirmed, having reread, she was saying how there's getting right in the spirit (like advents, pyjamas, jumpers, and that shebang) and then there's just adding consumerism and extra stuff for the sake of it, as if it's a thing. Bulging Christmas Eve boxes, because somehow we need all this stuff to open the day before Christmas, as the pile of presents less than 24hrs later just isn't enough. Then some people have 1st December boxes as well. Then we need an elf titting about on a daily basis, (an advent every day just isn't enough) which has turned up in the last few years, because, well everyone else has got one, so I'd better have one.
I totally get what she meant with tat mentality, it's got very little to do with something being literally made of plastic, I think that's pretty clear. Sort of how some people send Halloween cards now. That was never, ever a thing for Halloween. There's already plenty for Halloween. This is about creating extra consumption for the sake of it, specifically at a time we already have more than enough, and it's not a good ethos for our planet. And I do agree with that sentiment.
Still, your breakfast sounds tasty 
and if you and your kids like it, and there isn't much in the way of unnecessary/added waste. The plates you reuse year to year? It's a normal breakfast, served artistically. The only waste as such are the trinkets like pens you put alongside.