"a market shift towards book-styled foldables"
How can it be a market shift when the market is non-existant ?
There's no Fold Wide or iPhone Ultra in the market right now.
It makes me remember about the last "market shift" towards slim phones last year like Galaxy Edge or iPhone Air that were failures.

Only X2 elite is actually bringing measurable / meaningful change this gen tbh. Even their slowest SKU is only 20% slower in igpu adreno performance compared to their flagship extreme variant.

It feels like arm is catching up or closing the gap atleast but x86 remains stagnant. Whenever there is progress it's either not widely available or too expensive (2500+) making it irrelevant.

Most games boot now without crashing  too through the x86 to arm windows prism translation layer thanks to supporting avx and avx2 instruction set support. Altho there are some rough edge cases (e.g. poor perf in a** creed shadows) still and theyre still only catching up to essentially z1e 780m performance from years ago in terms of igpu.

But their efficiency in terms of wattage, noise, heat and perf. whole on battery with very little to almost no throttling can't be touched.

No DLSS isn't fully supported on RTX 20 & 30 hardware, it lacks frame generation, so it's not equivalent, and multi-frame generation is only available on RTX50 series, therefore it's not as backwards compatible as you make it seem.

nvidia dot com/en-us/geforce/news/nvidia-rtx-games-engines-apps/

FSR4 INT8 comes to devices like PS5/PS5P, Xbox and Steam Deck first before other of their generation, because they are known set configurations without a myriad of XYZ variables; so they are easier to build for and troubleshoot as a development platform. Unlike the various tiers of GPU CUs, VRAM, CPU, RAM, Storage configurations for add-in card setups.

It comes to RDNA 3/3.5 devices first (PS5P before PS5/Xbox) because the INT8 throughput is vastly superior. Makes sense to start at PS5Pro and work way down when PS5Pro can run INT8 @ 300 TOPS (about 50% more than 9060 close to a 9070, and similar to 3090/4070), whereas XboxX @ 24 TOPs, PS5 base 20 TOPs are far off the mark.

Also PS5 and Xbox outsold discrete add-in cards by a wide margin, so again focus on larger install base, all with iGPUs being the runt of the litter and not powerful enough to get focus other than as scraps leftover from the others.

That is as it has always been, where the capability is first, then ported to the major market segments, then trickle down to smaller individuals. If you've gamed for more than a weekend, then you'd know this by now from the old nVidia & Ati days with DX and OGL feature set support.