An N31 with 384 MB of Infinity Cache will be interesting, perhaps for different reasons than most are thinking though.
There are probably a few games that will actually be able to fit entirely within that cache, or nearly so, at least at lower resolutions. I'm curious about what kind of crazy numbers we'll see for FPS, or how much this will shift the bottleneck to the CPU which has also become far more contested as of late.
I'm curious if we might actually see AMD pivot somewhere much more interesting. CDNA is moving to APU chiplets it seems and AMD making all CPUs with GPU (and I assume video processing). I think that would actually make sense for GPUs as well. Where they have fewer but much more gaming performance oriented designs, where being that close (on chip, I'd guess even on die but perhaps separate die) reduces latency and enables the shared cache and memory. Add NAND/storage expansion. And when not-gaming can power the whole thing down and let an efficient APU manage the rest. Plus you run games fully sandboxed with its own dedicated OS further getting rid of ancilliary performance drains.
I think this gives AMD an advantage in that they've already been making such hardware (consoles) for years, only now, they target gaming performance (whereas before they were basically helping console companies leverage AMD's current processing designs into something affordable - often notably removing/downsizing things that boost gaming performance like caches) all out, maximizing the CPU and GPU design for it. It'd make rackmounting for game streaming easy as well, where its holistic (i.e. you provision the CPU and GPU for relative performance, plus memory, etc) and modular. Plus, they should just sell gaming cards as standalone eGPU boxes, and where TB4 becomes an input to the laptop as much as an output. Single cable charges the thin and efficient laptop, while inputting into the laptop display (should you be gaming on the go, otherwise you'd be going externally), with the laptop just handling the comms, overlay stuff. In the future, the laptop can move to wireless charging and we switch to fiber optic for data transmission (possibly wireless laser?).