I think its way to many sku's for nintendo at the front end of the generation.I know what this will be different but still. Here is plan for next Nintendo console I would like they make. 3 consoles at launch.
1. Home console. 4k resolution. Price $500.
2. Hybrid console. 1440p in dockrd mode, 1080p in handheld mode. Price $350.
3. Handheld console. 1080p. Price $250.
This will make next NIntendo console for everyone. Because there is a lot of people who play Switch only in docked mode and many of them would like to have console with better graphics. Many people like hybrid console, because they can play everywhere. And many people like to play only in handheld mode, so they buy Switch Lite.
my guess is they will just make the hybrid model that will be 720p in handheld that uses dlss to hit 4k . maybe in dock mode they will do 1080p to 4k
The steam deck is $360 right now and is using zen2/rdna 2 so I would expect something similar in performance to that, maybe a bit better on the gpu side