I wouldn't worry about it for a while, for at least two reasons.
Since GamesCom is over, the next show, in Tokyo, is almost a month away, so it probably won't be before then.
Plus, he also said, less than a week ago, "If I carelessly say when it will be released, you’ll end up with people saying things like ‘it’s been delayed again!?’ so I will no longer say at this type of event.", when he was in Shanghai.
Also, SONY execs have been known to talk even more directly in public and they have almost always turned out to be very wrong, for whatever reasons.
I'll wait for the press release.