How are you reinventing a laptop? There is zero friction.
You already have the phone. All the pieces are technically there to seamlessly connecting to a screen and a keyboard wirelessly and have it become a proper computer which is what it always was. I think Google has seen it and that’s why they have started working on their desktop mode but they are sadly stuck with underpowered cpu.
You need to think bigger. The sole reason this is not already a reality is because it would be a loss of money for Apple.
The only way this can work is wireless at which point you are reinventing a laptop.