The iPad looks as if it will fit in a lab coat pocket (they're pretty big). Doctor enters treatment room, pulls up patient records over the wireless network, view lab results off of the clinic server. Hmmmm. Need the CAT scan! Logs into the PACS server, pulls up a couple of radiology studies in Osirix. Activates virtual keyboard, enters whatever doctors enter after viewing X-rays. Drops down the prescription module and modifies the patient's meds. Sticks iPad back in his pocket.
Me, I've got a presentation to give to a Realtor's group in a distant city. I develop it on my 27" iMac, download it to the iPad, and tote it off to the meeting. I connect the iPad to the on-site projector, give the presentation through Keynote, and sit down. (Yo, Steve! A remote control, please! And put a laser pointer in it, too.) During the rest of the program I can take a few notes using the virtual keyboard. Someone asks me a question about local market trends, and I pull up one of my data providers in Safari and answer the question. Later that evening, I use the wireless keyboard to refine a client presentation for the next day--one I had developed on the iMac in Pages/Numbers and stashed on my iDisk.
A recreational pilot takes his iPad to the airport. He checks NOAA weather sites for flying conditions; files a flight plan with the FAA; and uses an on-board mapping program to display VFR routes and map info.
I see the iPad as a potential replacement for the MacBook air, and a staple in every road warrior's briefcase. The bluetooth keyboard and the projector capability assure success. A medical/dental practice app would be gravy. Think beyond your simplistic games and social networking. Apple is.