Id rather know that games are coming then not know.
It only makes people more likely to be disappointed. Sony always got a lot of criticism for announcing certain games early. This is something they don't do and this way it also remains a surprise. But you know very well that Sony has many more games in development. That they do not publish their list completely at the moment does not say anything, does it?
I wouldn't know why you would want to know what's coming in 6 years, and then try to build up hype, after which they only disappoint people because the games couldn't live up to it.