There are two different versions of the Orin chip, one being the T243 and the other T239. Since the chip in question is the T239, the actual specification is very different from what is being reported in this article.
Rather than the 12-core Cortex A78 CPU and 2048-core Ampere GPU found on the T234 chip, we're instead looking at the T239's 8-core Cortex A78 CPU and 1024-core Ampere GPU. This chip can run on a power range of 10-25W, and taking into account Nintendo's "customization" of the T210 chip in the original Switch (where they basically disabled the A53 cores and down-clocked both the CPU and GPU), we can't say for sure they'll make FULL use of the T239 chip either. For context, the current Switch barely uses more than 5W on the die, so they're going to have to cut down heavily if they want to maintain the current form-factor.
Perhaps to allow for low yields and/or lower costs they may once again disable CPU cores and maybe even GPU cores, and reduce clocks on both as well. Remember, the T239 chip itself goes into production at the end of 2022, meaning even if the Switch's successor were to arrive in 2024 they're still going to need this chip to be SUPER cheap as well as available in massive volume.
So here's my REALISTIC prediction of what the next-gen Switch will be like:
CPU - 6-8 cores, not sure how they'll clock it though
GPU - either they'll use all 1024 cores and run at a very low clock, or more likely they'll disable a few and clock it higher
RAM - 8GB LPDDR5 on a 128-bit bus with around 4x the bandwidth, at around 102Gbps. This is a big deal, and should never be a bottleneck for any game throughout it's lifetime. I doubt they'll go for 16GB because a) They'll never need it and b) Cost
This chip does have Tensor and RT cores, but whether Nintendo will make use of them in favor of low power is up in the air. For image up-scaling they might try using FSR instead, which doesn't cost them extra Watts. Or use the Tensor cores to upscale only when docked.
So we're going to have a Switch that's still slower than the VCR Xbox One on battery and somewhere between the VCR Xbox One and the PS4 when docked. That's still woefully underpowered by today's standards, so in the end they'll just be maintaining the status quo along side the PS5 and Xbox One S/X.
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