If we knew what they would be like, they would be here already. You can look at what we have today, and extrapolate, however. Mobile computing is already strong, and workgroup computing, such as Lotus Notes, is getting more mature all the time. Home computing is an idea whose time has come already, but it is one which many companies have trouble with. Trust is a major factor.
Interaction is another issue.
Speech technology is an area where IBM is currently one of the leaders of the field. Many of the chapters have so many examples, and so few concrete conclusions or recommendations that the impression they leave is a little muddy. Having said that, there is a large amount of good information in here, and I have learned a lot about interfaces by reading it. It will definitely affect the way I use interfaces in my programs in the future, and I will most likely refer back to it for some time to come. It should be interesting to see how much of the body of predictions about future usage of computers and interfaces turns out to be true.