Is the new security screening is new ones, ie, new machines, where you step into it sideways, with arms akimbo, would that be faster?
Or are they just transferring the screening machine across?
Though, I have to say, I liked the old way, with the 2 screening points for VAd flights.
Less people at each screening point, as the group of travellers would split into 2, one group going down the far left end, and the other group going down the right hand side.
Now, with the new system, unless we are flying J and can prove it, or have high status, everyone has to face the same screening point, ie, those flying VA, ZL and also JQ, so there will be a lot more people going through.
Also, as Aust allows non pax to go through to the gate, "to see relatives and friends off", the number of people at the T4 security screening point will be a lot.
Edit: "and don't worry, you can still collect your bags at T3", the guy says, with a slight German accent, so it would be a one way exit gate system, ahhhhhh... at least no need to walk over to T4 to get out on arrival, after flying into MEL Tullamarine (T3).