1-it wont work, because that would require to implement RF circuitry embedded in the chip which would occupy vital and large die area, it will not works indoor, could be jammed and spoofed with fake signals to confuse the chip to think is in another place.
It’s would be deeply unpopular but possible. The CPU/GPU could have power on activation logic, paired to its serial number that’s baked into the silicon. It would require a signed activation token( from Nvidia servers passed in through the GPU driver. It would be similar to the challenge-response tokens used in bank/debit/credit cards with EVM chips.
Then NVidia will need have various KYC (know your customer) infrastructure in place, similar to what banks and financial institutions use.
Would definitely open up a huge can of worms and they would definitely lose customers if they went this route, but it won’t be a major technical challenge to implement
