24/7 internet connectivity will be a certainty in the future. We'll have complete global coverage. You'll be diving and able to tweet. You'll be checking facebook on that space shuttle.
The idea that everyone needs a large computer with a lot of horse power is outdated. And the hassle that comes with is not something people want - lost data, viruses, maintainence, etc.
People want small 'appliances' that connect them to their data and applications in the cloud. They have spoken. That's what they want.