Acting for Two: In the 1954 BBC teleplay, the voice from the telescreen that sang the "Under the Spreading Chestnut Tree" song was voiced by Peter Cushing, who played Winston Smith.
Author Phobia: The Room 101 scene was inspired by Orwell's personal fear of rats, and the name "Room 101" itself was inspired by a conference room where Orwell had to sit though boring meetings.
Backed by the Pentagon: The 1956 film was revealed to be backed by the CIA by a historian. This was reflected by the number of anti-Soviet propaganda elements that can be seen in that film, as well as its changes to the ending.
Colbert Bump: While always a popular book, it gained much recognision after the NSA scandal in 2013, which sparked the "1984 was not an instruction manual" meme.
Disowned Adaptation: Not necessarily Orwell, but his wife (who holds the license for adaptations and so on after his death) made no secret of her disdain towards the 1956 film adaptation. Until her death in 1980, she actively rejected most offers for adaptations.
Doing It for the Art: According to Michael Radford himself, the location shooting for the 1984 film adaptation was done during the actual weeks given in Winston's diary for the events in question.
Executive Meddling: Virgin Films insisted that the 1984 version should be scored by Eurythmics in order to bring more audiences. Michael Radford was not happy with this, and as a result, withdrew the film from the BAFTAs in protest. The same reason also prompted Radford to change the originally bleak ending to a (slightly) more hopeful one. In the end, both the film and the soundtrack album was a success.
Keep Circulating the Tapes: The 1956 film adaptation never saw a home release, as Orwell's estate forbids any attempt for re-releases and renewal of rights (see above). A bootleg copy has been uploaded to Youtube, however, due to expiration of rights.
The 1984 film adaptation had two versions — one with the desaturated colors, and one with bright colors — the latter version had a DVD release in 2003. However, it is currently out of print and has never been re-released since.
The Democratic People's Republic of Korea seems to have taken many, many cues from Orwell. In a bad way. Christopher Hitchens, after his visit to North Korea, described it by saying "it was as if someone had taken 1984 and said 'Can you make it as much like this as possible?'" They have even gone as far as to build a giant pyramid building. And by law, North Korean libraries may not stock books older than fifteen years — the books must be re-edited and reprinted. Wonder where they got that idea.note The most terrifying part of all of this is that it is all plausible. There are no far-fetched sci-fi elements in it, and they had 30-ish years in the book — long enough to raise a generation who've never known anything else. Orwell lifted most of Big Brother's tactics from Stalin and Hitler and provided a reason (war) for otherwise rational men and women to accept the same tactics from their own government. It also happened a lot of times in the past, in the form of how theocracies proclaimed themselves as infallible by an omnipotent god. Though this also provides some hope, as North Koreans flee to China all the time, and when the Soviet Union collapsed people lined up to leave, and they were also a generation — two, in fact — that knew nothing else.
There exists an actual political ideology known as 'National Bolshevism', whose aims include: a rigidly hierarchical society led by a small group of inner elites; the intentional stagnation of technology and culture; the creation of a totalitarian society featuring elements of Stalinism, Maoism, fascism, Nazism, and theocratic absolutism; war for the sake of destroying excess; mass murder and genocide for the sake of itself. Also, its followers wish to establish a superstate known as "Eurasia". Mercifully, it's only a small banned fringe party.
Friends and colleagues of Orwell believe that his second wife, Sonia Orwell, is to be the model for Julia. Sonia's biographer suggests that a July 1946 essay about totalitarianism that Sonia had written was the possible inspiration of Julia.