The next generation of wide-area, sensitive X-ray surveys designed to map the hot and energetic Universe will be heralded by eROSITA (extended ROentgen Survey with an Imaging Telescope Array), the core instrument on the Russian- German Spektrum-Roentgen-Gamma (SRG) mission, scheduled for launch in 2019. eROSITA will perform a deep survey of the entire X-ray sky, and will be about 30 times more sensitive than ROSAT in the soft energy band (0.5- 2 keV), while in the hard band (2-8 keV) it will provide the first ever true imaging survey of the full sky. In this talk, we will give an overview of the scientific goals of the mission, and an update on the status of the program.