It is this How where design really plays its role. How does the user get from feature to feature? How do you access the feature, and how does the device respond once the feature is engaged? How can we encourage a community of use, or create the ecosystem this device lives in? All of these differentiators, these Hows, should add up to the "of course" moment. Of course it works like that. How else would it work? That's when you know you've gotten the right combination of differentiators to create a high-value product that will be memorable at next year's CES.