Unfortunately such services fall uncomfortably between two more established modes. As you can see in pictures of current container ships, they carry a huge number of containers, 20,000 or more with the latest ones, to give a low overall shipping cost. Meanwhile, if you want speed, Asia to Western Europe has always been one of the largest air freight markets in the world.
Trans-Siberian container operations fall between these two. The trains carry only a small proportion of what a ship can, and costs per container are far more. Double stack is not possible in Europe, which does not have the loading gauge of the USA - and also overhead electrification is generally incompatible with double stack, which has taken all the headroom where wiring might otherwise go. But they are not nearly as fast as air freight. Plus having to be transshipped in Finland, wait for the next departure to their destination (the big time-loser), and then plod round through The Baltic at 20 knots, and maybe a second rail journey when they get to the destination port, just elongates it all.