This is a big trade for the Penguins as it makes it clear they are planning for the future, while also still trying to stay competetive while they still have the likes of Malkin, Crosby and Letang all producing and playing at elite levels.
Smith had a down year with the Penguins and clearly just didn't fit with them, playing in 76 games last year smith put up 13 goals, 27 assists for 40 points.