[jjindev]

The way I've interpreted Ubiquitous Computing is that you walk into a room, and there is a computer. You pick it up and use it as casually as you would a magazine or a pad of paper.

You've done a valid experiment, but I think it illustrates why "if I only had one" is a wrong interpretation of Ubiquity. You don't just have one. If you are like most tech people you have a few, and maybe a lot, of functioning and current hardware. You probably have desktops and notebooks you can use.

And so in that environment a tablet should be good for the things you want to do when you just grab a tablet, in a room or an environment which isn't intended for serious work. And part of grabbing a tablet should be good integration with the other elements of your ubiquitous computing network.