The answer is easy, the future is Star Trek
Look at that and I think you're basically looking at the same for technology. Discrete communication devices worn as part of clothing, tablet like, portable mutli-function information screens. Convergence is inevitable, a lot of people are already nearly there (I was one of them with my itouch for awhile and the more I think of it, the less likely I'll go for a single function device for my next reader). It won't take too much of a leap to have a portable device that does all what we need and can be wirelessly connected to peripherals such as screens, keyboards, HD's once we're back at home, thus eradicating the need for a desktop and a portable device.
The future is looking rather spiffy, old chap