I just checked and the configuration of seats for the 28th on flight LH457 doesn't match with the current 747's that have the new product. Your flight is listed at F16 C78 M274. The new product 747 have F16 C53/67 M310/270.
However, I also heard that the LAX
would be getting the new product for the summer schedule so there is still a chance. I've flown the new business seat 3 times now and love it. Also, the video system is finally fully on demand. Good luck, hope you get the seat!