Kotaku at E3.
"Our team has been working on it," Yoshida said. "There are some things that we announced in February of last year that were not planned for the launch timeframe."
Yoshida didn't provide a timeline for the new features, but said he's asking his tech team "every other week" when they'll be ready.
During its PS4 reveal show in February 2013, Sony Lead System Architect Mark Cerny described sleep mode as a suspend/resume process that allows you to power down and boot up the PS4 from the same spot at the press of a button. In October, we learned that feature wouldn't be ready on day one.