Blizzard are aware that not everyone has a real fire to gather round this Christmas, so they have kindly provided a festive fire in the them of Hearthstone for you to gather round. It might not be as warm, but it's certainly pretty nice nonetheless.
The fire is part of a YouTube video you can find here and lasts for 53 minutes, so you can hook it up to a TV, drink some mulled wine, and play some Hearthstone to feel the Christmas cheer. Oh, and there's no mess like a real fire. It's a win, win!
The environment also changes every now and then too, so you can really feel like you're in the world of Hearthstone. A feast even gets laid out for you. What would you prefer: this or a real fire?