I have played all of them except the onlines and XII.
All the FF worlds have been very contrasted, but always consistent. Like you wouldn't find a car that could belong to the Queen of England next to a 1000 feet behemoth surrounded by skycrappers and crystal shards.
Sure, we had the Daytona, the Trains in FF8, and all kind of vehicles in every FF. But their design always matched the world they were in. Motherfucking Magitech, anyone?
Perhaps FFIV with the Hovercraft could be a precedent. But do I need to say that this fancy black cabrio seems to have (judging by this trailer) much more protagonism?
Honestly, when I look at the FFXV trailers I'm not sure about what kind of world to expect. The game keeps looking like a random mix of assets. Of course, every final fantasy has a world full of contrast, but I think this time they took it too far. That's just my opinion!
I'm not going to say that this is a big issue, of course. I'll just be patient and wait to play the goddamn thing, expecting that the world makes sense once I'm playing in it. So there's no need to hate guys.
That character design, tho...