Well that's a fact. Last year, they'd label every game. This year, they're playing on words.
I also think they are being ambiguous on purpose, pretty much every third party game they showed could end up being released on PC, putting the "Console Exclusive" tag would only confirm it.
This way people presume they are exclusive to PS4.
EDIT: The videos they just uploaded to their youtube channel pretty much confirm this.
https://www.youtube.com/user/PlayStation/videos