I've posted numerous times in various places over the years that I think we are heading towards our mobile devices being the entire computer in our lives. We'll be able to use whatever interface devices are convenient -big monitors, standard keyboard or small netbook-like interfaces like the Redfly (
www.celiocorp.com) or any other kind of interface you care to dream up. The mobile device will have all the computing power and storage space we need, or just fast access to a home base, but we'll use that mobile device anywhere, with the ubiquity of a credit card, without removing it from our pockets. Proximity with interface devices (screens, keyboards) will be enough.
And don't forget cool things like these wearable 'screens'
http://www.microvision.com/wearable_displays/index.html
I am so pleased to be living in these times :-D