Well just a guestimate, but Sony hired a graphics chip designer in Cerny and it took 30+ months before the ps4 was revealed and launched. So it looks like it'll be around 3 years after this guy is hired before a console is revealed. It goes in line with their usual console cycle. Should be 2017 or even 2018 before a new console is launched.
Whatever it is, I hope it has at least 16 GB of DDR4 RAM and a respectable cpu. Listening to 3rd party devs this time led to APUs.







