The LAME functions will remain for as long as the "classic" 737, 767 and now aging 744's remain in the fleet. Once these guys are gone, so are the LAME functions as we know them.
Surely arriving and departing aircraft are existing job functions. I don't see anyone else doing it on a380's or 738's.
worktorule, heard of M.O.D. (Maintenance on Demand)? J* and Virgin use it domestically. No need for a LAME to arrive or depart an aircraft. Only need to come out when there is a problem. Virgin Australia internationally don't have their own LAME's.
All the new generation aircraft "don't need" LAME's to arrive or depart them.
Wait for the all new "futuristic" airport in Sydney in the coming years. QANTAS and its subsidiaries and One World partners will operate from what is now Domestic and where the hangars are and all others will operate from what is now the international terminal.