I noticed today that the already amazing seat is getting an upgrade - the Kosmo Suite 2.0 will have fully-closing doors that are apparently see-through only from inside the suite. It also looks like they raised the height of the partition for even more privacy. The partitions can be raised and lowered and yes, I had a lot of fun playing peek-a-boo / Bye Felicia! with Kelly during the trip :)
We have the big Japan trip coming up next spring, but we're doing ANA and JAL for that trip so we won't be able to check this out anytime soon.