We don't know yet what Panasonic NZ will opt for. Panasonic US discontinued the "GT" series but their ST is similar to last year's GT and VT. Panasonic Europe has discontinued GT models above 50" but their new ST looks more like last year's ST.
There's still a 42" ST and GT in Europe so it looks promising that we'll get one of them.
If we're lucky Panasonic's mainstream 2014 plasmas should be similar to the ZT60 in performance. Panasonic has a two year development cycle like Intel does so 2013 is a minor update year. The ZT60 was about completing with LG's OLED.
If the ZT was to come into NZ, I'd expect its distribution to be restricted... much like the WT LED lit LCD's. I strongly doubt Panasonic would like to see an 'enthusiast' panel turning up in a 20 percent off, 30 months interest free sale at Noel Leeming. They could even go 'specialist only' Hifi stores with it? Perhaps we'll see a limited release at some point? Fingers crossed, but with Panasonic saying "No to Asian markets", well, I wouldn't bet on it.