I think "overjoyed" captures my reaction upon learning of the show's actual return dates. After all, watching Benedict Cumberbatch's Sherlock and Martin Freeman's Watson is such an enjoyable experience.
Admittedly, I was a latecomer to the show (and, okay, to some sort of Cumber-[collective]), but I quickly caught up during a Netflix binge on series one and two only to discover that series three wasn't even a rumour yet back then.
So, yes, Sherlock is back, and, as it happens, Sherlock is also free (in a sense).
According to the LA Times (12/30/13) now all elements of most of the stories by Sir Arthur Conan Doyle (except those which appeared in the US in 1923) are in the public domain, and the characters of Sherlock Holmes and Dr. John H. Watson are free of copyright.
But here are the details: New Sherlock Holmes Mystery...(LA Times, 12/30/13).