lol no doubt!
But really the UI in OSX is mostly unchanged since 10.0 and there really isn't any reason to change something that works just fine for most people, apple came out with dashboard and still didn't try to force it on anyone, unlike metro.
The Metro UI is primarily for Tablets and touchscreens. I don't even think that's debatable. There's plenty more for developers but they're slow to utilize it and show it's value to buyers. it is early, Microsoft clearly wanted to get 8 out the door ASAP and on tablet devices ASAP. Shortcomings be damned. Sort of like they did with the Xbox 360 which resulted in the RRoD fiasco. This won't be that bad ...
But as I said, the desktop is used more than the command line, and even that has not and will not go away. In fact, for pros, it's more powerful than ever and there are many things you wouldn't want to do anywhere else. One word: Powershell. The desktop and MDI isn't going anywhere. There's a reason GUIs and MDI took over and have never left since Xerox Parc. That won't change with the tablet form factor. Microsoft is going for the professional tablet market, if they were going for the consumer market with RT, they lost before they started due to lack of software and middleware. You still can't sync WP8 or Surface RT with a desktop running Windows 8. They're all over the place. They're too big.
You think needing a scroll bar for basic UI inputs = productivity... seriously?
I have to agree with you here. The app looks fantastic but operates horrendously. I uninstalled it. I spent more time trying to navigate and get to what I wanted than actually consuming content. What a waste, but great looks.