Ubisoft has announced that the upcoming Tom Clancy's Splinter Cell: Conviction for PC has been pushed back two weeks from April 16 to April 30, why, Ubisoft have yet to say.
Whether it could be related to the pull of Assassin's Creed II and Silent Hunter V from Steam is questionable, or perhaps it's due to Ubisoft's new DRM which requires you to always be online to play the game.