Yeah, take the upcoming Epic Mickey for the DS for example. I think the game looks gorgeous, but I've seen many people on the internet complaining about the "ugly" or "outdated" graphics. I am shocked. I love the 16-bit look. For me, it's both clean and pretty timeless. But gamers of today obviously don't agree.
Anyway, looking at the map screen in Hotel Transylvania it looks like parts of the map are kinda faded. I wonder if it's unexplored areas, OR maybe the map has two "layers" with doors that you can enter by pressing "up". That would be a nod to something like Goonies 2, albeit less confusing to navigate.