We've seen the predictable results of MS' thinking: Excel on tablets. And it wasn't pretty.
There is Numbers for iPad as well.
iOS is designed to run on the devices it runs on. This is obvious. This is why it's succeeding beyond wildest expectations. There's a reason it's the highest iteration of a mobile OS.
So are you saying that Windows 8 isn't designed to run on multiple devices?Why is Microsoft advertising it for tablets if they did no work to optimize it for tablets?