Thats 3 markets where Pizza Hut has gone all in on DTS - Canada, Singapore and now Oz.
That is starting to look like a very strong case for the US to consider - and of course various European countries.
It also speaks volumes about the relationship with YUM! who have multiple other fast food chains - including Taco Bell, KFC...see YUM below
https://en.wikipedia.org/wiki/Yum!_Brands