It means mostly nothing since Melbourne has always been a place where the weak overachieve for a day.
Back in 2011 for example, Vitaly Petrov --the man who most remember for being the only thing that stood in Alonso's quest for a 3rd title during the 2010 season as they circled Yas Marina endlessly with Alonso unable to get past to score those desperate points needed-- placed third in the Renault/Lotus. Breathlessly many assumed as they usually do this meant Renault soon to be Lotus would be achieving great things. They however did not, and would never again see a podium finish that season. Petrov was quickly ushered off to a backmarker Caterham the next year before finding himself out of the sport altogether.
Should be good for sponsor money perhaps before they move to their back of the grid location, where they should remain for most of the season.