Why Buy a Kindle if You Can Use an iPad?

An app to read e-books from Amazon’s Kindle store on the iPad has arrived in iTunes. If that is the case, why buy a Kindle at all? Price, you might correctly note, but wait a couple of years and that problem goes away.

That suggests a major Kindle price cut has to be coming. Historically, many multi-purpose computing devices have sold better than single-purpose devices, when there is a choice. That's why iPhone sales are cannibalizing iPod sales.

With the arrival of the Kindle app, iPad owners will be able to choose whether to read books from Amazon or from Apple. Using the iPad gives users access to all Kindle inventory, with Apple inventory thrown in, as well as color support and the ability to do lots of other things that require Internet access, ranging from email to Web browsing to messaging.