I think you'll see that won't be the case. Business 101. They are and always will be released close to each other. No way MS releases the next xbox without the PS4 right behind it (or vice versa), unless Sony has waived the white flag. Otherwise, one of them will have total control of the market. MS got late in the game with the Xbox. It was a good business decision to release the 360 before the PS3 and taking over the market. I expect release dates will return to normal now.
_________________________
Hoosier by birth, Red Raider by choice... like KNIGHT and day.