iOS was not designed for phones
iOS was developed for tablets. When Apple looked for the operating paradigm for their phone what is now called iOS was seen as an ideal match for the phone they were trying to develop. The fact that the iPhone came out first is irrelevant.
Moisten the catapults!
I purchased a Xoom over the weekend it's a great device, a little heavy, but very awesome for its first pass. I used to own an iPad 1, gave it away, didn't want an iPad 2. Why do I need two devices of the same OS where the UI was designed for the iPhone (smaller device) to begin with? I love the versatility of honeycomb, widgets are phenomenal on a large tablet screen. Everything is great about the interface so far, although there are a few things here and there which make no sense, but I'm sure they'll fix that. I ran into some bugs, called Moto support, they troubleshooted with me, fixed it and were really cool about it. As far as hardware, the materials are great, but definitely Motorola needs to learn a thing or two about button placement. They put the sleep/wakeup button on the back of the device. I used to like to hit the home button on the iPad to wake it up and do stuff (while I was having a bowl of cereal for example), with the Xoom I can't do that, I HAVE to pick up the device. Another interface/hardware awkwardness are the volume buttons and I cannot find a way to change volume within the device itself, unless I press the volume hardware buttons a window will popup.
Other than that, I can live with all this, and the device is extremely awesome and a fresh feeling of a new UI the way it should be done for a tablet.
iOS was developed for tablets. When Apple looked for the operating paradigm for their phone what is now called iOS was seen as an ideal match for the phone they were trying to develop. The fact that the iPhone came out first is irrelevant.
Moisten the catapults!