ON A WEDNESDAY NIGHT, during Berlin Gallery Weekend’s mostly digitized preview days, Hannes Schmidt of Schiefe Zähne and I were about thirtieth in the queue for chili cheese fries, which we were to bring back to the gallery where Richard Sides was putting finishing touches on “The Matrix,” an exhibition he made about being immersed in a technological world of uncertain boundaries. The show includes a crude cardboard homage to Spot, a robot dog offered by Boston Dynamics to the tune of $75,000. Killing time during the long wait for provisions facing a 10 p.m. curfew, most of the nearby restaurants