It's the last time they were on stage together until recently, back in 2007. The clip doesn't show the entire game—thankfully omitting the part where Lotus CEO claims that his favorite place to program Enterprise Software is "in the butt, Bob"—but it does show why a young Steve Jobs got way more ladies than a young Bill Gates.
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It was a different time, back when it was still ok to have fun. If you got these guys on a stage now, it would probably look more like Chair Throwing Geraldo Springer show than Dating Game.