Who was the president of bell labs during it's heyday? Long term it doesn't matter. Altman is a hypeman in the vein of Jobs.
Ai research will continue most of the OpenAi workers probably won't quit if they do they will be replaced by other capable researches and OpenAi or another organization will continue making progress if it there to be made.
I don't think putting Altman at the head of research will in anyway affect that.
This is all manufactured news as much of the business press is and always will be.
You can have the best leaves and branches but without good roots & trunk, it's pointless.
From everything I can tell, Altman is essentially an uber-leader. He is great at consolidating & acting on internal information, he's great at externalizing information & bringing in resources, he's great at rallying & exciting his collegues towards a mission. If a leader can have one of those, they are a good leader but to have all of them in one makes them world class.
That's also discounting his reputation and connections as well. Altman is a very valuable person to have on staff if only as a figurehead to parade around and use for introductions. It's like if you had Linus Torvalds, Guido van Rossum, or any other tech superstar on staff. They are valuable as contributors but additionally valuable as people magnets.