Just musing as I scroll through social media...
Most people I know seem to have houses where there's a distinct theme - one colour/style of furniture per room, curtains that match sofas, some of it is to my taste and some isn't, but either way you can tell at a glance what they are trying to do, be it grey chrome or white minimalism or rainbow or whatever.
When I was a kid, I don't remember people's houses running along one particular theme the way they do now, obviously you'd have a few trends pop up, but I don't remember things being so matchy matchy, except perhaps for my aunt's house, where she had a "special" sitting room for the adults, all done in terracotta and pine. Mostly though it seemed to be a case of, I like this picture, I'll put it on the wall. MIL has given me a pot plant, I'll shove in that corner. Those curtains would do for the bedroom. That's a nice colourful hard-wearing rug, it'll go in the hall. I don't think there was quite as much emphasis on everything tying in so exactly to everything else. My house is a bit like this now - all the walls are white, because we had to redecorate when we bought it and I was sick of rental magnolia, the curtains in every room are different patterns because my granny got a seamstress friend to run some up for us as a housewarming present, our bedroom furniture is a complete mishmash of nothing matching, that sort of thing. I love our house and I'm not complaining, but I don't think you'd walk in and be able to pinpoint any particular style or trend.
I know people from quite a range of backgrounds and incomes, so it's not something that seems particular to any group, just that homes in general seem to be more styled/pulled together/matchy these days.
Is it because of social media? Because it's easier to get bits and pieces in places like B&M? Though there's always been home stores