The cross-compatibility with the PS4 and the PS Vita are going to be more important than you might have first thought.
Published on Apr 9, 2013
Though Sony has already released the PS Vita, both the handheld console and the upcoming PS4 were developed simultaneously according to Sony's president of Worldwide Studios, Shuhei Yoshida.
In the latest issue of Edge, Yoshida explained that work on the PS4 started as soon as the PS3 was released.
"As soon as we launch a platform, we have small number of tech people move on to planning for the next. As soon as the PS3 launched in 2006, I'm sure some parts of the company, especially those hardware people who work in R&D and the semiconductor [area], must have started the R&D effort."
It wasn't until 2008 that full development of the PS4 really began, however, and it was then that a "larger, more cross-sectional team" began working on both the PS4 and the PS Vita.
"PS Vita was a shorter project compared to PS4," said Yoshida. "but Mark and Worldwide Studios were involved in both projects, and we worked on both projects simultaneously."
So it seems that cross-platform control that Sony was so keen to advertise during the
source : http://www.nowgamer.com/news/1880714/sony_worked_on_ps4_on_ps_vita_simultaneously.html
