At least cooling shouldn't be a problem. They've taken the cooling design from the 2016 Macbook Pro and reversed the airflow for an 80% improvement in temperatures.
View attachment 261509
It thermal throttles under load - ie when being pushed (for "pro" work) in under 10 minutes.
Again, not trying to be a smarty pants and start a flamn'.
This is empirical evidence from rendering tests I ran myself in a "head to head" - early 2017 - when I had access to a 2012 MBP, a 2016 MBP (fully maxxed out) a 2013 MacPro and a 2010 MacPro, and the i7 versions of 2013, 2014 and 2015 iMacs (with the beefiest GPU's for Apple's AIO's).
In a nutshell, the 2010 and 2013 MacPro's were able to continuously render without throttling.
The iMacs hit the wall in about 40 minutes
The 2016 MBP started to throttle in under 7 minutes, and became unusable 3 minutes later.
Vray/Sketchup.
We're already seeing how hot the 7900 gets with
very good water cooling.
Intel Boiling Lake.
Apple better get the "Golden" version of the i9/Xeon's - the one's that run at normal load, with less volts.
(The chips you pay more for from silicon lottery).