The point is that both were called smartphones.

So... something that's very different from what's already out there isn't a new category, because it's using an old name. But something that is just like what's out there already but has a new name isn't a new category either.

New products and new markets are popping up all the time. They don't come into existence fully formed like Athena, and they may keep the name of what they evolved from, but they are very different. My "smart phone" isn't a phone, it's a handheld computer that includes a phone as a minor function. I use my "phone" as a phone about as often as I use my "computer" for computation.

Makes me wish I was European enough to be able to call it my “handy” (as in handheld computer) and have anyone take me seriously.