A bunch of Apple Apps recently got updated adding support for the new Mac Pro and to take full advantage of the new Pro Display XDR( including Final Cut Pro, Motion, Compressor )

The release notes for most of these apps have references to Mac Pro (28 CPU Cores) and Pro Display XDR

Looks like Apple will soon launch the new Mac Pro and Pro Display XDR in this month, that is October 2019.

However the company is yet to declare an event for the month.