Alright, all great things for a startup guy but I don't think they're the qualities required for the CEO of a multibillion sprawling company. They have no need to popularise or use lisp, no need to sell companies and I'm not convinced this is bigger than eg /r/technology? Not that that's a bad thing, but it's a bold claim to say this is the biggest tech news forum.
Way more importantly though, PG hasn't turned creating startups into an assembly line. The closest thing to an assembly line he's got is converting strong founders into startups, and still the majority 'fail'. For him to continue that at Microsoft, Microsoft would need to attract strong founders consistently and there's no reason to suspect they can. My suspicion is Microsoft has about as many billion-dollar units as PG has billion-dollar investments, so the actual value is unclear.
Don't get me wrong, PG has a proven history in startups, technology, investments, he writes well, he seems incredibly smart.. but I don't think he nor Microsoft think he has the qualities of a Microsoft CEO.