Lol, I never said 5.5 GB/s SSD was impossible xD. I do question the validity of use of the 22 GB/s maximum compressed data rate in terms of what data really benefits from that level of lossy compression without particularly noticeable quality degradation, though.
It's an interesting patent, that's for sure. But companies like Sony and Microsoft have patents for many, many different things and only a fraction of them become actual commercial products. I've seen others speculating this could be for cloud streaming and that's a viable alternative worth considering, at any rate. It's still debatable whether a chiplet-based design can truly match the performance of a monolithic die on the same process node. So far conclusions show that to be "no", but the obvious advantage of a chiplet approach is scalability and modularity.
Those are big benefits and with this type of design, if Sony were to roll with it in actual production, they could actually bring back the PlayStation Portable line rather easily by simply reducing the chiplet count. Of course, there's still other things worth resolving to make it a fully viable approach, such as making the mesh of GPU chiplets transparent to devs as a single GPU, working out how framebuffer image would be built and sent out to the display device (which I know the patent touched on with as an example), and just how scalable could they make this i.e how many GPU chiplets in a mesh design for an APU design could it really handle (probably useful for something like scaling down size for a portable system spin-off design, for example), could the GPU chiplets be of different sizes or must they all be of the same general type regarding CU counts, power, etc. How do you connect them memory-wise, do they all share the same memory or have their own dedicated chunks of of-chip memory (harder to manage, technically feasible to establish some type of cache coherence between the memory pools and GPU chiplets with a cache-coherent interconnect though like Infinity Fabric which AMD already extensively uses; more GPU chiplets would probably call for reducing the bandwidth per chip for IF interconnect though), etc.
I think the patent covers some of those questions but not all of them, because some just can't probably be tested at current time. But I look forward to seeing further work from Sony on this and/or any other companies that are likely no doubt exploring very similar multi-GPU chiplet approaches with AMD or other technologies. If a commercial gaming product can come to market from it, that's all the better!