Microsoft's E3 2014 press conference is scheduled for Monday, June 9 at 9:30am Pacific.
Not that it's been an issue these past several years, but yes, the presser will be viewable live at a number of different venues including Xbox.com, Xbox Live, Twitch, and surely a few other sites. Expect to hear about new properties, sequels, and Japanese games from "very few execs."
My mind is willing, but my body is not ready for E3. It never is.