Featured is a novel technology falling somewhere on the spectrum from being a realistic elaboration on a currently existing technology (for example, human cloning), to a scientifically plausible portrayal of a technology far beyond our current capabilities (for example, self-replicating nanomachines), to a technology that is unsupported by science as we know it (for example, time machine).

Examples:
"speculative technology" themes come in great numbers in science fiction, and also great variety. It is convenient to further sub-categorize them according to function, for example "artificial intelligence", "speculative biotechnology", "mind altering technology", and "speculative weapon".

References:
https://en.wikipedia.org/wiki/Technology_in_science_fiction https://en.wikipedia.org/wiki/Category:Fictional_technology