I believe the reason the tiles work well with the cabinetry is because the tile is lite in color and flat, its not rustic unlike most terracotta. The expensive cabinets work fine with the floors because of the smooth finish. The floor here is the focal point of this room. The Interior Designer or whoever did this room, did a very nice job, keeping it very simple.

Carpet has come under fire because of the allergy/asthma reactions. Carpet can hold dozens of pounds of human skin/dust/mites in it. It can never be fully cleaned nor can the dust be completely removed. Because of this, many people are looking for solid flooring options which reduce allergens, reduce asthmatic events, are easier to clean and last longer. High end carpet (the stuff that is worth more than hardwood) still has its place in high end homes - often times in luxury bedrooms/luxury appartments (noise issues have to be taken into consideration) but on the whole, the general public is shying away from wall-to-wall carpets. Cork flooring is seeing a huge increase in sales because it "takes over" for carpet. Soft, quiet, warm, easy to clean, hypo-allergenic, antimicrobial, instect resistant. It is the "go-between" type of flooring for people used to carpet who need to move to solid surfaces for their health. As Canadians, we love this flooring because it is so warm.

I think oiling it should be fine, but if you're unsure, maybe ask a flooring specialist through Houzz just to be on the safe side.

The all black kitchen looks scary as. Maybe because there's no lightness in there at all.