For stunts like this to resonate and become positive social currency, they have to hit a nerve and contain a grain of truth. No-one believes Redmond will make a dent in the iPhone’s share. Microsoft’s biggest barrier to their usual mainstream OS play is of course Android, and that ain’t going under either.
Way to blow cash. Many brands would, ironically, kill for this kind of throwaway marketing budget. And do a lot more damage with it.