The latest is that it now replies to our “what does dog say” kind of questions with an image too, as can be seen in the first screenshot
Apart from this, you can ask Cortana to “roll a dice” or “flip a coin”, when you are stuck and not able to take a decision.
Do let us know, if you find anything else?
Read all about Cortana and Windows Phone 8.1 here.
Thanks to everyone, who tipped us!!