Price is also an important factor. The starting price of the iPad is $499, while the starting price of a MacBook is twice that at $999. If you want portability, and you're not looking for a mobile powerhouse, the iPad is a cheap, easy alternative.

Combine these factors, and I think you have a compelling argument as to why Apple should be concerned about the iPad competing with its own laptop market. Of course, that's not necessarily a bad thing--either way, Apple wins.

For more tech news and commentary, follow Ed on Twitter at and on .