A lot of Mac Pro users now are not GPU-limited but CPU-limited.In terms of CPU I think Apple were in a strong position 12 months ago and are in an ok position now. Where they are struggling is GPU and for the MacPro that's probably the biggest issue, IMHO of course..
So for some use cases Mac with outstanding GPU performance is not a priority.
So long as Apple has priority on any node process improvements then I see Apple keeping to where they are in performance per watt, raw performance, battery life and other metrics that is important in a world we want to lower our carbon foot print, have cool to the touch devices and have near 1 week battery life