There is a lot of question regarding the iPads benefit to the professional world. Ultimately, it will be developers who define its use through innovative apps that increase productivity and expand the ability for users to do business. iDisplay, from Shape Services, is getting an early start. This Apple approved app will allow users to utilize their iPad, as well as their smaller iDevices, as an extension of their Mac desktop. This has the potential to be useful in both personal and professional worlds.
It's unclear if this app will be usable for all Mac computers, if there will ever be PC connectivity, and if this will catch on with the business world. We here at 148Apps will be monitoring the progress of this app closely.