I haven't had a television in the past decade... but I still buy soap and toothpaste. The advertising from decades ago still haunts my decisions. I'm more likely to get a brand name toothbrush over a non-name one, even if it costs a few cents more (my preferred flavor of toothpaste is mostly discontinued - its harder to find cinnamon toothpaste than mint... so its Tom's of Maine which is easier to find cinnamon toothpaste for). I'm also more likely to ty a different variation on a major brand soap than an off brand soap (I've found I like irish spring oatmeal soap...).
Advertising isn't necessarily a "do this, get money today or tomorrow". I suspect that the advertising from the 70s, 80s, and early 90s; however, is paying off now... at least for my purchase decisions.
And so, it could be interesting in another decade or so as these companies find brand awareness of the next up and coming generation "lacking."