It's possible, but one would expect that they would have mentioned it if they did. The slides don't necessarily indicate actual chiplets but rather just separating portions of one chip (especially since they do call it "chip")I wild idea I had.
Sony is using chiplets in this, right? Looks like they went the chiplet way instead of monolithic.
So, about all those old talks of Navi being multi-gpu... what if Sony is predicting a "PS5 Pro" three years from now and their chip already has some space reserved to add another chiplet doubling the GPU? Not only would be possible, this way would also be cheaper?