I'm currently attempting to outline a novel that is set roughly 100 years after World War II, in a universe where the outcome was significantly different. I've been having a lot of fun devising things to take the place of certain objects, and this is certainly giving a tinge of science fiction to the story. However, where would you draw the line regarding everyday mundane items? Take, for example, Velcro, microwave ovens, digital video recorders, etc. Do you believe that readers would be able to easily accept the presence of such anachronisms? Or would they stand out in a world filled with analogues for our current technology?