I think there is hope for this whole mobile and tablet future if, and only if, it will be possible to plug your phone/tablet into something that has a keyboard,

I think there is hope for this whole mobile and tablet future if, and only if, it will be possible to plug your phone/tablet into something that has a keyboard, mouse and two large monitors on your desk to work on that (and then take it elsewhere and do the same there). On top of that, optionally the device needs allow you to install and run any software you want without restrictions, and basically have unix shells and desktop UI when plugged in the stuff mentioned above. Of course, also, the CPUs and RAM need to be on-par with current desktops, but it's kind of realistic that this can happen, and the actual desktop box could be reserved for things that require some extra computing power.