Not to know the past is to move blindly into the future. Since history repeats itself, or at least people do, we ignore the lessons of the past at our peril.
The new world realities do not make Orwell's speculations on the future any less valuable. Indeed, they underline Einstein's comment, shortly after the first atomic explosion: "The unleashed power of the atom has changed everything save our modes of thinking; we thus drift toward unparalleled catastrophe". It was the aftermath of this catastrophe which Orwell imagined in "1984."