This seems aimed squarely at VSCode. VSCode does a lot of this now out of the box (or with a few extensions). I think Atom is really just trying to keep up. I personally do not believe they have the horsepower to compete with Microsoft here though. VSCode is a phenomenal product.
I've always chosen Atom over VSCode because I don't want these features. Autocomplete even on really expensive IDEs runs way to slow, clever auto formatting and it's ilk tend to not work well for me at all, and I dislike the overbearing project management features in most IDEs. I want a text editor that vaguely understands code with some simple file browsing and plug and play extensions. Atom trying to become VSCode…
Not true for jetbrains ones. Autocomplete speed is One of the reasons for me to go for their toolbox subscription