Yes, in this context, the use of so is for emphasis. So here is another way to say definitely or really, but it gives more emphasis to the adjective here. Not everyone uses so in this way, and it is usually more common in certain dialects of English than others. However, using so like this sounds like the kind of language that would be used by teenage girls.
Ex: You are so going to love the new shoes I bought.
Ex: I so want to go to Italy.