Sorry, but if ARM+Nvidia GPU already runs rings around everyone else besides Apple and Nvidia already has access to all of Arm's IP (and there was no threat of it losing that access) then why does it need acquire ARM to 'solidify' their position?
In reality it's not winning in the mobile SoC market and owning Arm will enable it to hinder its competitors.
Arm was never going to be acquired by a Chinese firm - it would have been blocked.
The problem is that controlling its own destiny gives it control over all its competitors destinies too - and that's not good. I have nothing particularly against Nvidia btw - the same issue would apply for any major SoC designer buying Arm.
In reality it's not winning in the mobile SoC market and owning Arm will enable it to hinder its competitors.