I was going to say the same thing. The whole article is mispremised. If you think, "Who would switch to a virtual keyboard from a real keyboard?" you'll have questions about the iPhone. If you ask, "Who wouldn't switch to a virtual keyboard from a cellphone 0 - 9 layout?" you'll understand the market the iPhone is targeting.

It's a consumer product, not a business product. The idea for the iPhone is that in 5 years everyone age 14-24 will have one, just as has already happened to the iPod.