Probably a misunderstanding.Didn''t Jensen implicate that rest of the GPU would idle when tensor cores are active?
AFAIK, tensor program flow is controlled by regular compute cores, but the heavy math operations are executed on tensor units. (Same as with RT cores) Tensors can not do any logic, they only can do math.
Also the diagram above does not make much sense to me, the term 'int32 shading' alone really is a bit pointless.
The proper question more likely is: When the warp issues tensor or RT commands, does it become available for other work while waiting?
If yes, then DLSS or RT can not only run along with other async compute or rendering tasks, also the warps working on RT / DLSS could help with those tasks while waiting.
Even if we could see analysis of a BFV / Metro frame, and DLSS would run alone as in the diagram, this would not proof it's not possible. (often doing such stuff async hurts performance due to cache trashing or other bottlenecks, and the devs decide against async)
Edit: To be more clear, DLSS can not run 'for free'. Even if it could, it would at least share bandwidth with other tasks.