There are some good points by Asimov in that review. He's right that 1984 has a bizarre fixation on 'Stalinism' while ignoring other forms of totalitarianism. It is also feels incredibly dated because of this fixation and because of the setting (WWII dreariness and dilapidation).

However, Asimov is too committed to the idea of sci-fi as prognostication, and that a work of sci-fi succeeds or fails based on the accuracy of its extrapolations. This is a simplistic conception of the genre and no scholar of sci-fi would take it very seriously.