Yeah, I see this on cruise ship cabins now too. There are different classes, but the cabin pricing varies a decent amount within each class based on all kinds of minor factors. Midships vs forward or after, close to elevator, what's above / below you, size of balcony, adjoining room, pullout couch, obstructed view, etc, etc. Kind of annoying in that you used to be able to "get lucky", but it's more efficient in a competitive market (which cruising definitely is) to be able to select exactly what you want and only pay for that.