[chrischen]

> There is no reason that iPad software won't be as sophisticated as current desktop applications like Excel.

Only if you consider the fact that both are computers and theoretically capable of running any arbitrary code.

Also factor in the new way of using a computer (via touchscreen). Will that work out? Consider the fact that Apple has a tight control on apps and development. How will the amount of innovation fostered by each system compare?

When you consider those things, you'll realize the argument is not on whether or not the iPad is capable of replacing the software but on whether or not the iPad's design and platform can be a viable alternative to the way we use computers. Because, theoretically any computer is capable of replicating software capabilities.

Consider the Mac vs PC battle. The Mac is capable of doing pretty much everything your PC does, but why does it have less market penetration? Consider the various factors to that.