The Revised 5e PHB does very little to inform the tone and style of the world through the text. Instead, all of that is communicated via the art. What the people look like, what the people dress like, what the towns and cites are like, it's all in the art. And the world the art depicts has come a long way from when I started, 30 years ago.
That world isn't a pseudo-medieval Europe stand-in anymore. It's more modern; maybe not a full 21st Century equivalent, but magic is common enough to have a substantial impact. It's more cosmopolitan; adventurers of all genders and species rub shoulders in cities that are similarly diverse. And I have to think, "This is the world the kids today want to play in."
After all, that's what D&D has always offered. The chance to imagine yourself as a hero in a world of fantasy. But who those heroes are and what the world is like changes over the generations. When I started in the early 90's it was already different from the founding days 10-15 years earlier. With Revised 5e we're several iterations further down the line, now. D&D has always bowed to the prevailing sentiments and updated itself.
I'm middle aged enough that I'm not entirely conversant in the tropes and styles of the under-30 set, but what I know says that Revised 5e is the game they want to play. And the kids usually win out thanks to numbers and enthusiasm. I don't think I mind that much. It seems a friendly and happier world than the grimdark angst of the 90s. So I'm willing to go along with it and see how it feels.