It appears that Cathay Pacific will 'officially' launch it's brand-new premium economy on the HKG-YYZ (Hong Kong-Toronto) route in March 2012 on the Boeing 777-300ER. While nothing has been stated on the Cathay Pacific website, the new seat layout appears to be loaded into the GDS inventory. Additional routes will likely be announced over the coming months, perhaps to JFK, SFO, LAX, LHR, CDG, NRT, and SYD among others.

http://airlineroute.net/2011/08/20/cx-77g-mar12/

Hong Kong – Toronto [eff 02MAR12]
CX826/827 Day 7
CX828/829 Day 35