You can see the seat using Google Streeview using the link below.
http://www.sas.dk/alt-om-rejsen/ombo...n-Street-View/
Please note that SK still have a few A340s that have not have the new cabin installed and Premium Economy is a bit different on these aircraft (but not as different as the business seats are).
Svantevit
Edit: HKG should be almost guarenteed the new cabins.