Adapted from Aardman Animations' celebrated claymation series, episodes of Wallace & Gromit will feature adventure gameplay similar to other Telltale series Sam & Max (PC, Wii) and Strong Bad's Cool Game for Attractive People (PC, Wii).
Telltale has not yet specified which platforms Wallace & Gromit will hit nor when it will arrive. Given Telltale's history, a PC version should be expected, with a strong possibility of a Wii release.
The first cinematic teaser trailer from the game is viewable below. BOOM video 695