Web appliances are a perfect example.
Yet companies keep on rolling out new Web appliances like Sony's Airboard, a portable touch screen tablet that allows you to watch TV, access the Web, and send e-mail. They probably meant the recommendation as a practical joke. Of course, some of the gadgets are rather useful. This would be a much more useful feature to integrate into a cellular phone than Web access. I seldom feel the need to surf the Web on my cell phone.