And after 6 it will probably be over 117m possibly before the PS5 is even announced. That would be crazy.
117? I mean, 25M would be really more than just incredible between now and E3 2020
Personally I'd say 108-110M PS4 by E3 2020
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/