Really? We're equating phones, ipods and tablets to PCs now? Walk into an office with an iPad and tell your boss you don't need a computer any more. See how far that gets you. By the same token, there are more bikes than cars, I guess Detroit better hang it up and call the liquidators, bikes won.
"devices" aren't even in the same area code as PCs and laptops, capability and *usability* wise. Trying to equate one to the other is ludicrous. One observation that stuck with me about tablets vs computers is that someone remarked "Tablets are information and media consumption devices, while computers are information and media creation devices". And it's true. I have a tablet. I love my tablet. It's great for looking shit up or watching a video in bed or or reading email on the train on the way to work. But if I have to type a paragraph on the thing I want to hurl it down the hallway by the time I finish. And if someone told me I HAD to do my job on it, I'd put it on the desk, walk out and become a farmer, garbageman, mechanic, or anything else that wouldn't force me to use a tablet to do tech work.