Kaz Hirai is implying 2015 and possibly 2016
He also seems to be intentionally misleading the press in regards to the whole "ten year life cycle" thing. At no point in the past did this mean "no new hardware for ten years".. both PS1 and PS2 lived far beyond the introduction of new hardware. What it means is that the platform will be supported for ten years, even in the face of something new. PS2 in particular really did have around a ten year life span, with games being developed for it long after the launch of PS3. I see absolutely no reason for that to not be the case here.. that PS4 could easily come along next year, yet games would continue to be developed for PS3 for another three or four years, thus fulfilling the "ten year life span". The press, however, seems to be incredibly gullible about this, and whenever Kaz brings it up (himself referring to the end of the PS3 and not the beginning of the PS4), the press assumes "no new hardware".
As noted elsewhere, this generation has already gone on for a long time. The X360 will turn
seven this year. No major console manufacturer has
ever gone this long between platforms. Ever. Looking at the history of Atari, Sega, Sony, Nintendo, and Microsoft, the longest stretch between the launch of devices has been six years. That's
launch, mind you, not announcement. We're already past six years for announcements on both fronts.. both MS and Sony are well overdue for new hardware. The Wii U may not be "up to snuff" in terms of technology as graphical prowess, but neither was the Wii, and at least Nintendo is doing something (the Wii will be six this year, incidentally).
I wouldn't put too much into the reports of "no announcements at E3". Do you really expect any of them to say "Yes, we're going to announce new hardware"? Nintendo actually did that last year, but only after significant leaks and rumors (to the point where the actual reveal didn't show us anything we didn't already know), and that pre-announcement announcement came barely a month before E3.
I'd give MS a 75% chance of announcing at E3, and Sony a 50% chance. Even if there's no announcement at E3, I think there's a 90+% chance of both of them announcing
something this year. Based on what happened in 2005, if one of them announces, it'll almost guarantee that the other will, too. Neither can afford to do nothing while the other demonstrates whatever's coming next. It wouldn't surprise me if they both make preparations for an announcement even if they don't plan to actually do it, in the off-chance that the other one announces, they'll have something thrown together that they can demonstrate.
Despite their both saying that there will be no announcements, I think people (read: "the internet") will be universally disappointed if they actually go through with it, and don't announce.