Why is Isro's test launch of 'game-changing' rocket important?

The launcher would enable Isro to place satellites weighing more than 4 tonnes in orbit

Indian Space Research Organisation (Isro) plans to undertake next month the first developmental flight of “game-changer” rocket, which can carry satellites weighing 4 tonnes into space from Sriharikota spaceport in Andhra Pradesh, according to Chairman A S Kiran Kumar.

Currently, the space agency’s geosynchronous satellite launch vehicle (GSLV MK-2) can carry satellites weighing only 2.2 tonnes and depends on international launches to orbit satellites heavier than that. 

The satellite is scheduled to be launched during first quarter of 2017 by GSLV-Mk III-D1 launch vehicle from SDSC SHAR, Sriharikota. The launcher would carry GSAT-19 satellite which has a mass of 3,200