Rumors have it Apple is a month away from announcing a tablet computer. Another tablet, the Crunchpad, is also due for imminent release. These and other fine keyboardless computers get great play on gadget blogs (including our own Crave), but in the real world, I believe this whole category is a nonstarter. Why we keep waiting for the killer tablet computer is beyond me. Few people really want one, especially at the prices that they will have to sell for.
Tablet computers--elegant slates that you operate with a touch screen--are attractive if you're a sci-fi fan. There's something functionally beautiful about a computer that's all screen and nothing else, and where your interaction is directly through that screen, not an intermediary like a keyboard or mouse. And the concept works great on smartphones.
But what you can do with a screen-only computer gets really limited when you expand the device beyond pocket size. There are two big limitations. First, you need a keyboard for doing real work. At least most people do. Perhaps a generation of kids will grow up that are as speedy on a virtual keyboard as they are on a real one, but until then anyone who does more than write quick e-mails and Twitter messages on a computer will want to take a keyboard with them. And typing on the screen, even if you can do it, is an ergo disaster. Either you have to keep your hands up in the air (if the computer is mounted vertically in front of you) or you have to hunch over your screen to see it. Maybe it's the national chiropractors association that's pushing this form factor. See also: Jeremy Toeman at Live Digitally.