That's not how I see it. On a Win8 tablet, you have a tablet optimized UI in Metro.
A tablet optimized UI with limited app support at this point. And you've discouraged developers from adding support by letting them continue to reach their customers with the legacy interface.
If you bring up a productivity software, you switch over to conventional keyboard/mouse inputs and you're good
You're good? Not if you want to continue to use it as a tablet.
On an iPad, you have a tablet optimized UI in iOS. If you bring up productivity software, you have no choice but to do the best you can with the tablet UI and a BT keyboard
Or just the tablet UI. Because it's a tablet.
Again, there's nothing wrong with wanting a hybrid experience. It's great for some people/use cases. Personally, I see it as an okay tablet and a poor laptop.
Apple simply chose another philosophy. A laptop is a laptop. And a tablet is a tablet.