It's a bit hard to believe the long-delayed Splinter Cell: Conviction will actually be out soon. If you needed something tangible as proof, you could always try the Xbox Live demo of the game, due out this week.
It'll be released on March 18, which is this Thursday. Two levels from the game are playable, though they're not successive sequences, the action skipping around in order to avoid any potential plot spoilers.
The game itself will be released on April 13, for the PC and Xbox 360.