Never let it be said that Google gives up on ideas that don't pan out the first time. Remember when it tried invading our living rooms with clunky, disappointing set-top boxes? And then when that very same software went on to find a life right on smart TVs? Think of all that as a prelude to where we are today -- Google TV has given way to Android TV, and now NVIDIA's cooked up an interesting spin on a formula that's nearly a year old. The Shield TV's gaming cred and sleek design make it far and away the most interesting Android TV setup we've seen to date, but does that mean it's worth your hard-earned cash? The short answer is "yes," but the Shield only shines brightest if you've got the right sort of hardware already in place.