It's got as much to do with Conan Doyle's Sherlock as Pride and Prejudice with Zombies has to do with Jane Austen. So what? This kind of stuff doesn't in any way harm the originals, or make it harder to access them. If anything it directs more people towards them.

I'll watch this, and enjoy it. But I can't imagine going back to it again and again, as I do with the stories.