Salesforce is building the tallest office tower in San Francisco...
If the "Salesforce Tower" became the "Microsoft Tower" it would not feel right. It would feel as if a giant hand was scratching a giant chalkboard, 24/7. SF is not an outpost of Redmond.
Benioff would make a great Oracle CEO. Many people have no idea Oracle has two CEOs, or can name them. The Oracle culture needs strong, flamboyant leadership, imho.