The annual Nintendo kicks off annual in Los Angeles . Electronic Entertainment Expo will demonstrate its forthcoming Microsoft Xbox 360 gaming system . On the software front for the Xbox 360 , `` BioShock Infinite will be showcased in a four-hour event .
The annual Electronic Entertainment Expo kicks off Monday in Los Angeles . Nintendo will demonstrate its forthcoming Wii U gaming system . On the software front for the Xbox 360 , `` Halo 4 '' will be showcased in a four-hour event .