An additional heat source during winter is more a necessity than a benefit. Some older fireplaces work great, but don't have visual appeal. When this couple wanted to reface fireplace as well as remove stained carpet flooring, we knocked out two birds with one stone (literally), by installing tile. Not a normal (or traditional) bedroom floor covering, but unique and durable nonetheless.
Using different sizes of same tile family, and some creative lines, we created a romantic space with rustic design. Some people would never think of adding tile to a bedroom floor. But the comfort of natural stone under your bare feet really is warming.
Tile is also a natural solar collector. Whereas it stores heat throughout the day and radiates it off later at night, when cooler.