Pity the poor smiley face. It once was the go-to symbol to convey e-emotion. Cyberspace was its oyster. It reigned supreme. But today's mobile app era has become something of an emoji-eat-emoji world.

If you use Twitter, you'll notice a new emoji gracing your feed today, in the form of a majestic crown. Buckingham Palace has released an official emoji today to celebrate the coronation of King ...