I can't find a good reason for computers playing videogames. I read another comment saying that they could be your buddies in an adventure game... what's the point? The fun is to play with other people. We already are able to play with bots (different algorithms rule them), so I can't see why someone would prefer this over them.
About traslating this from a virtual world to the real world... I can't imagine who would think it's a good idea to give this type of freedom to machines in a physical world, were consequences are way riskier than something digital (and yes, digitally they could empty your bank account, physically they could kill someone. One is much worser than the other).