The thing about computers, any computer really, is that all their processing consists of if/then scenarios, yes/no conditions, essentially many on/off switches. What makes them look impressive is the speed at which they can run through these pre-programmed scenarios to arrive at, again, a pre-programmed outcome.
The reason a computer can beat the best chess players is because there are a finite amount of variations in strategy, due to the rules of the game. The same with the new Jeopardy! bot, because there are rules to the game and a finite source of answers, the computer can find those answers faster and more consistently than its human competitors.
However, what even the greatest computers lack is the ability to predict and spontaneously adapt to new scenarios, or to learn anything new without outside programming. They are a crude approximation of the human brain, really only capable of recall and regurgitation of logic. Even if you consider the human brain to be the approximation of "god", via the universal collective sub/consciousness, they're not even close to that because they don't operate like one.
Plus, I think that in order to call something "god", it has to be alive in some sense. Computers neither think, nor live.