I have no idea if this is even slightly reliable, but with the unstoppable leaks from microsoft anything can be.
The rumor is that nextbox will be in two sku, one traditional, the other a blasphemous crossing between series s and the switch.
And supposedly in 2026, MS rushing out a new console gen to replace the failed Series.
Dear MS:
Mobile: Zen 6c, XDNA3, RDNA5+ on TSMC N3P. On package GDDR7, 18gb ram is enough (you only need PS5 + ai model), large MALL cache needed for maximum perf/watt. I'm talking like 96mb stacked SRAM here, you need to share it between CPU/GPU/NPU and ideally it'll hold an entire 1080p render target set (48mb just there). You need as short a trace as possible, "LLC include tag" as a compiler hint would be really useful here.
Dedicated: RDNA5 is chiplet so this can be biiiig, 100(50 WGP) is entirely plausible, go for a straight 4090 performance. Don't need a big CPU, Zen 6 full 8 core with large LLC is enough here, you'll be more limited by single core stuff as always. Only need around 128mb cache here, if it goes out to a 256bit bus who cares. The big question here is streaming. Private streaming to anything nearby that actually works well is a good selling point for high end, talking high quality 120hz 4k HDR encoding @100mbps, wifi-direct, mobile optimized 10mbps 1080p60 streaming, stuff like that. If your rich audience can play their high end gaming console on any of their TVs, or their Ipad, or their laptop, at the flick of a switch they'll be happy.
Controller: Do you have someone that actually, you know, likes video games? Not some accountant that thinks Series S and Gamepass are innovative? Good, put them in charge, especially of the controller. This thing could be a dual-sense, plus the Switch 2's haptic joysticks, plus it could break into two (hey it's needed for mobile anyway), you put accurate motion sensing in them and you have your possible VR controller/Wii like controller already just in case you somehow need that. Wif-Direct so you can
carry it to the screen you're streaming to and get low latency controls back to the console. Speaking of, wifi direct audio, USB-C audio, 3.5mm headphone jack if needed, audio needs to be low latency when streaming but don't do Sony's droolingly stupid move of making it a proprietary codec that doesn't even exist only when there's plenty of better options.