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Your Pixel can now double up as a full Android PC with nothing more than a USB-C cable
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
Any apps that are available on Android can be used with desktop mode, including Collabora and OnlyOffice. I assume there will be variable levels of optimization though since this is still so new.
Edit: Forgot to mention that you should also be able to run linux apps https://www.androidauthority.com/run-desktop-linux-apps-on-android-how-to-3586539/
So new, as in, it has been available forever, just not on google phones. But every other manufacturer has done it at one point or another in the last ten years if not more.