Except that for some reason Australia picked MPEG-2 for our digital TV, and so HD was almost unwatchable. Though it seems we've moved to MPEG-4 now.
There's some documents available under FOI (posted online) that have some further info on H.264 in digital broadcasts in Australia.
Frustratingly, my TV isn't compatible, but a much older set top box (purchased to avoid silly DRM) works fine.