Never the less it would be nice to have GI Works in. Even if not for entire GI, it would nice for indirect shadowing and ambient.
Calculating those is fairly efficient and not memory intensive, and it can add a lot of visual fidelity to scene.
Especially, when your scene is more closed or dense populated by objects. Doesn’t mean it have to be inside building, but lots of foliage or building close to each other.
Indirect shadowing, help a lot with breaking flat look, adding much more sense of depth to entire image and proper ambient term, help with normal maps being to dark under certain directional light angles.
Waiting for more info about possible integration.