Disclaimer: I'm an English major, so my percentages make perfect sense to me.
75 percent of the time, I prefer a Mac for the ease of working with multiple windows/apps, the full size keyboard, the computational power, and the ability to run desktop applications. Usually, though, this 75 percent of the time occurs in my office or when I am working at home. I have multiple browser windows open, 2 different docs open, and I am working back and forth between items on a 27 inch monitor.
The other 75 percent of the time, I am shifting towards an iPad as preferential. When I'm in the classroom, I am generally displaying something I've already created (in my office) and don't need the same device (which is usually heavier and more unwieldy). I'm increasingly reading eBooks, pdfs, etc. and it's more natural on an iPad. iPad's offer pencil input, which adds to more "like writing in the margins" feel. For Web surfing, I'd rather be on by iPad.
The OTHER 75 percent of the time, I prefer my phone. I always have it. It's in my pocket. I can look something up quickly. I can avoid making contact with other people while walking around. I can access files I've created that I store in the cloud, etc. etc.
I mean I think our predispositions and use cases inform how we see these evolutions of the iPad. If I'm trying to do what I do the first 75 percent of the time on an iPad, it's a gimped Macbook. If I try to do what I'm doing the other 75 percent of the time on a Macbook Pro, it's a gimped iPad. If I try to do what I'm doing the OTHER 75 percent of the time on my iPad or Macbook, they're a gimped smartphone.
Personally, I dig the changes. I think Apple IS trying to think about how cursor integration should be different on a touch device and I think that mission has the ability to push innovation in input across all platforms, so that fundamental ways of interacting with computers don't remain stale and static.
