Well that's good at least! I remember the uproar of the Michael Jackson fans when his This is It DVD and Blu-ray came out and there was so much difference between them.

 

I had a look at the DVD’s case and the disks and want to share some thoughts because I think that the hardware gives us some information in a nutshell about series 3. I’ll just describe a bit of what I see. You may interpret it on your own.
For the first time there is no Sherlock on the disks. John is on one of them and the other one is black with a pepper shaker. No salt shaker.
The disks complete the picture that you can see behind it only if you remove the disks and then you can see the whole picture with Sherlock in it on the left side. If you remove the picture from behind the transparent layer you can see the scene clearly where John sits alone in what looks like a canteen or coffeeshop. Sherlock stands outside and can apparently see John but John is not aware of him, but lost in his mind. John looks sad. Sherlock is there but he seems almost like a ghost because you can’t understand why John doesn’t see him.
The picture as a whole seems to be inspired by Edward Hooper’s paintings e.g. Nighthawk. It creates a certain atmosphere of night and loneliness and lost connection. A feeling of being strange in a changing world.
 
A little interesting detail is the fact that you  have to push either a cross or a yin/yang symbol to remove the disks.
There is obviously somebody responsible for the concept of the design of the series 3 DVD who put some thoughts into it.