Xbox November 15th 2001---------------------------------------- PS1 December 3rd 1994
4 years later------------------------------------------------------------5 years 3 months later
Xbox 360 November 2005---------------------------------------- PS2 March 4th 2000
8 years later------------------------------------------------------------6 years 8 months later
Xbox One November 22nd 2013---------------------------------PS3 November 11th 2006
4 years 4 months and counting...---------------------------------7 years later
Xbox Too (pending)--------------------------------------------------PS4 November 15th 2013
----------------------------------------------------------------------------4 years 4 months and counting...
----------------------------------------------------------------------------PS5 (pending)
A November launch for both consoles in 2019 (6 years) would be my guess.
...to avoid getting banned for inactivity, I may have to resort to comments that are of a lower overall quality and or beneath my moral standards.