I really don't understand this at all. According to iSuppli[1], Apple pays $229.35 in parts and labor to make the low-end iPad. They develop their own operating system, buy incredible amounts of ads, and yet they still have massive profit margins selling iPads for $500.
Meanwhile, Motorola and Samsung and other manufacturers get a free operating system and get cellphone carriers to give them a bunch of money to sell the device with a data plan. Yet their devices are $600-$1000, they often have smaller screens, and are (probably) loaded up with crapware. I fail to see why anyone would ever buy something like this, and I fail to see why anyone thinks someone will buy one.
Even if no company has a supply chain as good as Apple's (which I have trouble believing, considering how many components are manufactured by Toshiba and Samsung, for instance) and they need to pay an additional 20% for parts, they could still make the same device, sell it for slightly less and still make plenty of money.
[1] http://www.isuppli.com/Teardowns/News/Pages/Mid-RangeiPadtoG...