Yet another reason to get an iPad. Check the “Rewind” gesture at 1:35.
Prototyping right in the context of use. Great idea.
Obviously, tablets might become truly personal devices in the future as competition drives down the prices. But for now, you should assume that you’re designing for a multi-user device. For example, users might be reluctant to stay permanently signed in on an app, and they’ll still forget their passwords. It’s also important to design recognizable application icons so they’ll stand out in the crowded listings of several users’ apps.