Hold fire! Is Dishonored really GOTY?

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"Dishonored is the Game of the Year."

Everybody's saying it. Dishonored seems to be one of those games that hit all the right notes from not only the design methodology used, but the level of freedom and choice offered to players.

Whilst I haven't been able to get around to playing this yet (I'm incredibly busy these days), the feedback on the Internet is telling me I'm missing out. I will get around to playing it, but what about upcoming titles such as Assassins Creed 3?

Have we heralded Dishonored as game of the year a little early? If not, without spoiling it, tell me more on why you feel this deserves that much wanted accolade?