But that's true for normal Jeopardy too. The best buzzer person (Ken Jennings or Brad Rutter) wins because of their reflexes and timing. Watson just took that edge off the table and flipped it back at them.
That's good for a intellectual challenge, but for game shows to work, they need to be questions that players at home, viewers who earn them their advertising dollars, know. They want us to be sitting on the couch shouting out the answers. If we're sitting there clueless, it's a much shorter distance to changing the channel or taking it off the dvr.