That's not enough range to do London - Sydney, it's not enough to do Los Angeles to Sydney either, or Los Angeles to Tokyo, it's basically a replacement for trans-Atlantic flights only because even US cross-continental Mach 1.3 is only about 50% faster than a 737 (3h vs. 5h)... It's pretty much geared to the prestige market only.
Under an hour to anywhere on the planet, meanwhile, is absolutely someone would be a premium for -- and they'll do it for most/all long haul flights if it was available.