PS4 will be have a focus by Sony in its Tokyo Game Show. However, there is still some doubt regarding the opening show, with PS4.
The event is reportedly scheduled on September 19th. The first day show includes the press and trade. The event is sponsored by many top officials like Sony Worldwide Studios president Shuhei Yoshida.
The PS4 is expected to be exposed in August and in September in Grace Gamescom and Eurogamer Expo respectively.