I guess a new plane means new face make up, particularly if you're in touch with your feminine side.
I've never understood the Premium Economy class, it's like buying a Commodore with wings.
In fact why doesn't Qantas reclassify their seating classes into something that is more Oztralian.
Economy = Scumbag class.
Premium Economy = Scumbag class pretending you are not a scumbag.
Business = Business expense write-off class.
First = Tax avoider class.
The could even paint lines on the outside of the fuselage to help with the distinction when they are all flying together.