I picked up a book-sized pen tablet in June and love it, despite its 1999 vintage (inability to play Flash or enter SSL). I carry it everywhere, and nearly no one double takes me in the line at the bank or movies, not at all like when I take out a netbook. The clipboard and pen paradigm is far less intrusive even than the two-fisted game-boy paradigm, and in a totally different league than the laptop (even netbook).
- Give me a paperback sized 800 × 600 screen any day over a screen like a postage stamp, or even credit card sized screen on an iPhone 320 × whatever.
- The pen is faster than the touchpad. Really-really. Your hands and eyes are working simultaneously, not linked.
- There's less sense of isolation with a clipboard computer than other paradigms.
Ask any doctor, counselor, or salesman what a laptop screen does for doctor/patient, or customer psychology. You're in a fortress behind that screen, and nothing overcomes the anti-social aspects of it. The medical profession is rife with tablet computer advocates; see any pen-computer forum and it's filled with doctors and lawyers. For example, One of my friends is a child therapist. She had a small Sony Netbook back in 2003, before the concept was born. Even for such a small machine, she instantly recognized a laptop screen was inappropriate for taking in-session notes, and reverted to her Palm IIIc.
Then you have a game boy two-hands computer, where you have both hands on the machine, so it's undeniable that you're paying attention to the machine at least as much as the person you're chatting with. Bzzt. Game over.
Compare these with a clipboard. Even with both hands engaged, one holds only a stylus. You can look at the other person and tap the stylus on your desk or chin and no one thinks you're computing instead of listening. People are used to thinking of clipboards as innocuous. A tablet computer is barely perceived.
And tablets generally run regular MacOS X or Windows, so there are no dumbed down applications to learn. I have Office and Internet Explorer and Photoshop in my man-purse, so I don't have to reformat my documents when I get back to my desk. I love my tablet.
YMMV.