All through the impressive displays of computer-generated imagery in Round House Theatre’s “Fahrenheit 451” — based on Ray Bradbury’s apocalyptic novel about a society burning all of its books — an audience member may be forgiven for thinking: “Um, ever heard of Kindle?” Of course, Bradbury wrote “Fahrenheit” in the early ’50s, when he could have been prescient about intellectual repression but not about the ability of humankind to digitize its literary resources.