A report by Chilean publication El Mercurio On-Line out of the recent CES 2013 event in Las Vegas, appears to have caught a Sony exec from another division of the company sharing details he probably shouldn't be, seemingly confirming that the expected next generation PlayStation console will be revealed at E3 2013 in June, or ahead of the event in May (Thanks NeoGAF Forums):

Hiroshi Sakamoto, Sony Home Entertainment general subdirector also highlighted how important the Chilean market is for the Latin-American technology adoption.

LAS VEGAS.- We saw new products in Las Vegas, but also could talk during some minutes with some of the top executives of the main technology companies.

One of these meetings was with Hiroshi Sakamoto, Sony Home Entertainment general subdirector, who told us in a short interview that they have an important announcement related to the PlayStation consoles to be made in the coming months.

...

Regarding consoles, people say that Sony will make announcements this year and that would be working on the new PlayStation. Are we going to see a new model in some months?

It's still a big secret, but our Sony PlayStation friends are getting ready. I only can say that we're focused on the games related E3 event, booked for June. The announcement can take place there or even before, in May.

But are you working on a big reveal or in something complementary?

Probably the first, we plan to release big news for this date, but we have to wait at least until May

Given that we're passing through two language filters and talking about an exec from outside of Sony's gaming department, it's hard to gauge the reliability of these comments, but it does gel with the rumours and analyst predictions we've heard so far about the next PlayStation, codenamed PlayStation Orbis.