Sony Computer Entertainment Japan Studio will host a live conference today at 19:00 JST (3 a.m. PDT / 6 a.m. EDT).
Here is the description for the event:
“An emergency guerilla broadcast from Makuhari Messe! We’ll be introducing a PS4 and PS Vita title (or PS4 and PS Vita titles) that we’ll be showcasing on the show floor. Don’t miss it!”
You’ll be able to watch it live on Niconico.
Read more at http://gematsu.com/2014/09/sce-japan-studio-live-conference-happening-today#KKS2TTdoIoHmTsiw.99
"We will spend a good amount of time introducing the PS4 and Vita titles that we are showcasing on the floor" is a better translation. There is absolutely nothing that even hints at a new game announcement."