At the moment, NBN Co in their standard speeds have their highest standard at 100/40 regardless of the fixed line technology type. Fixed Wireless maxes out at 50/20.
Providers can if they so choice offer higher speeds however the NBN Co pricing structure at this stage is pretty prohibitive of that, the last estimate I saw was that if they were to offer a true Gigabit connection on FTTP at the current pricing it would be someting like $15-20k per month that they would have to pay NBN Co, which would mean the retail price would be above that again...