It sure is.
If you had told people in 2019 that a computer program could summarize large topics and write cogent output you would have been placed in the asylum.
Leaving aside the mind-blowingly large amount of research on summarization that existed in 2019, I'll say this: by then the task was so we'll understood that there were multiple tldr bots on Reddit.
Whats different these days is people might actually trust the tool enough to use it :)
[1] https://www.officetooltips.com/word_2003/tips/getting_to_the...
It can be. Summarizing process can be tweaked very slightly to give more space to certain POVs, make them sound more reliable than others via word choice etc. The subtlety can make it undetectable, yet it can have strong effects when applied on mass scale.
I don't know how this will look like, but it is a very powerful technology to sway the public opinion one way or another.
Both will be factually correct, but they will each manipulate the opinion of the non-expert reader by giving more attention to specific facts.
GPT seems to be very strong in being able to present information with some specific accent, e.g. there are many examples of "write this in the style of [person, literary style, political slant]".