Chris (not Reid) has found an interesting article at 1Up: a StarCraft II preview which compares the game to Wing Commander III! In fact, it's subtitled "Single-player campaign = Wing Commander?":
The big departure from StarCraft is that story won't be doled out only in cut-scenes and through in-game conversations. Instead, in between missions, you'll get to control Jim on board the battle cruiser Hyperion, interacting with different elements of the ship and chatting with shipmates in role-playing-game style conversations with branching dialogue trees. The way you navigate the ship (click on a control panel, point of interest, or character milling about the deck) is reminiscent of a modern-day Wing Commander III or IV, only minus Mark Hamill and giant kitty puppets.