A big ethical question is what happens after people stop using the device. Does it degrade the environment? Could it have been designed so it would actually be good for the environment?

It is relatively easy to design for the perfect cases, when everything goes right, or when all the information required is available in proper format

AS for all those mistakes I make - they are on purpose - to teach you how to deal with them

Simplicity design axiom: The complexity of the information appliance is that of the task, not the tool. The technology is invisible.

Will robot teachers replace human teachers? No, but they can complement them. Moreover, the could be sufficient in situations where there is no alternative––to enable learning while traveling, or while in remote locations, or when one wishes to study a topic for which there is not easy access to teachers. Robot teachers will help make lifelong learning a practicality. They can make it possible to learn no matter where one is in the world, no matter the time of day. Learning should take place when it is needed, when the learner is interested, not according to some arbitrary, fixed schedule

Attractive things work better.

Our information lives will be better served when we are free to get to our information from wherever we are, with any device available.