Development for the system began in 2016.
One could think that designing a console is just slamming a CPU and GPU on a motherboard, shove it in a plastic casing and be done with it. But this is not the case at all, as these things take a really long time to get everything right, efficient, user friendly, easy to develop for and so on. In fact so long, that a reasonable guess is that Microsoft and Sony probably are in the early planning stages of the next Xbox and PlayStation 6.
