FUD Zilla spreads word that Samsung's plan to create its own mobile GPU have been delayed to the 2017-2018 timeframe. The South Korean conglomerate originally planned to deliver its own GPU much earlier but the effort got delayed for unknown reasons. The goal seems to be to create a new Exynos SoC with Heterogeneous System Architecture (HSA) support, the initial version of this should come to market in 2017 with a Mali GPU and then by 2018 the GPU part of the chip will be replaced by Samsung's in-house GPU.
Samsung's own GPU will probably find its way by 2017 or 2018 which is a long time in computing. The Exynos 7420 processor uses Mali-T760 MP8 graphics and there are indications that the next generation Exynos expected in 2016 will use the Mali-T860 and T880.
Samsung needs to stay competitive as the Qualcomm and MediaTek made more noise about having the GPU and CPU that work together to speed up tasks. Not even Apple has its own GPU. Apple used PowerVR for years while the Qualcomm had its own Adreno graphics.