Let me get this straight. So android isnt a "victory" for unix, everything that runs on ARM devices either, top 500 computers either, then what on Earth would you consider a "victory" for an OS? By your own terms, no OS is successful because no one cares about OSes, not Windows, nor iOS, nor anything.
You're missing the core point though, which is that for the vast majority of end-users, OS is irrelevant. People don't actually care about it, they don't care about whether or not they can study and modify the source code; the one item that the open source communities value the most is something that most people don't actually give a flying one about.
Android is a great example of this. I see figures of something like 500 million devices, but of those, what percentage of users actually bought into it because of a Linux kernel? I'll give you a hint - it's less than 1. The important criteria for a smart phone are something more like: can it make calls? Can it send SMS? Can it take photos? Can I sync it with my email? Can I browse the web on it? Can I play Angry Birds on it? Answer "yes" to those and it doesn't matter if it runs on Unix, Windows or magic jellybeans - you've got a sale.
Android is not a victory for Unix; it's a victory for the applications and services provided by the platform, and if they weren't there it would have crashed and burned. None of this is about Unix versus Windows versus iOS versus whatever tomorrow's flavour of the month is; it's all about the applications and services you give to the user, and those run on the OS, they are not the OS itself.
A victory for an OS is to be the preferred platform to use when developing something, because that is what it is, a platform, what makes the hardware usable. And if being everywhere and used by everyone on every kind of hardware isn't a "victory", then what you would consider a victory? I just don't get it. What makes other OS for you more successful if you stated that OSes don't matter for the user?
You seem to dismiss everything on the basis that "no one cares", but that way it would be the same if we talked about Windows, Linux, Darwin, OS/2 or whatever thing out there that the end user doesn't sees directly. And if you're measuring success on a field where every single thing fails, maybe you should consider another field for comparison altogether.
Unless that is you wan't OS developers try to make the end user care about their OS that is...