Ooohh.. We're going back to the days of the SGI (among others) workstations! I fondly remember those super cool SGI boxes in my university's engineering labs running IRIX, MIPS processor, debuting OpenGL, and being really cool for 3D modelling. They were so cool, but within just a few years were converted to x86 architecture and then outright replaced by mainstream computer manufacturers (i.e. Dell Precision, HP Z, Lenovo ThinkStation).
Workstations are still doing things that more plebian machines cannot in the realm of AI. Example: Nvidia Quadro RTX vs. GeForce 2080Ti: The Quadro cards have more professional AI library compatibility, more memory, the ability to combine GPU memory spaces, etc.
Workstations are not dead just because they're x86 and neither is their premise or high-end professional use case.