I just watched the trailer. Err uh... well I'm not the fanboi type so if it's good I don't care; they haven't made the mortal sin of calling it "Sherlock Season 3" anyway.
Also funny thing, the trailers for Sherlock looked like full on crap the first time I saw them too, took me a few nudges from trusted sources to get me to give them a chance, so basically nothing new here. It's also an american series so you know., gotta go in with a open mind... ie. expect some things to suck.
According to wikipedia it's not out yet... or am I mistaken.