The option to open Hyper files in 2019.4 is great! For some of our use cases it would be even better, if we would be able to directly open Hyper files that have been published to Tableau Server.
It should be possible to achieve this by combining the Tableau REST API method Download Data Source, which returns a Tableau Packaged Data Source (.tdsx), which then would need to be converted to a Zip file to be able to navigate to the contained Hyper file.