Wow, a lot of people here taking liberties with the statments (shocking, right?). All i read into it was that they wont be first to show off what they have to offer.
One, im going to assume they mean MS since nintendo already released their new console. Seconldy, my personal opinion is that Kaz means announcement. MS will show off their system with a big announcement. You dont want to be trumped. Samsung showed off new phine last year because they wanted to get a jump on apple because the galaxy s3 was less known. Say what you will, but sony still has a better known console world wide than MS. So if MS has a new system, and lets assume it looks good, sony will want/need to trump that. This is all speculation on part, but they didnt mentiom anything about release, etc. I think they will just announce after MS and sony will still follow their planned release (probably end of 2013)
Also, i think itll be a bit begore E3. Sony has a habit of announcing things before e3. I can see them announcing the console, specs and 1 or 2 titles and an onslaught of titles at e3