For me, the technology that propels 1984 is definitely a product of science fiction. Part of the story is about the misuse of technology and how that warps society, according to one's point of view anyway, and for me, that is a product of science fiction. Is it only a simple fictional story with science fiction props? Are we disowning 1984 for lack of space ships and robots?
Speculative fiction is a slippery slope moniker. It can be used to give a science fiction story a sense of class, so people who don't read science fiction might want to take a look at it. When we are hacking away at society, there are two main avenues that can be used. One is greed and the other is technology. We don't need technology to demonstrate greed, any kind of fiction can do that. The use of technology that keeps the story grounded in reality is used throughout ordinary literature. Technology becomes science fiction when it propels the reader into a world of fantasy. Are we saying that 1984 is so humdrum and ordinary and we are already living like that, that there is no fantasy in it. Wouldn't it make more sense to believe we haven't reached that point yet?
Perhaps my thinking is distorted by my amateur standing as a part time Luddite, as evidenced by my smart phone that is used as a camera, is online only to connect to instagram, and does no voice or texting, that is relegated to an old phone that won't make the 5G cutoff and takes half an hour to start to load a web page, that always times out. I think it is the page that says you are now entering the internet.