The seasonality of fashion probably isn't that big a problem.  Many people regularly buy new watches, handbags, sunglasses and the like for hundreds or thousands of dollars every time the fashion changes, so there is clearly a market.  Also there is enough margin in most mid to high end fashion items that you can throw in some cheap electronics without it having too big an effect on the price tag.  You're going to buy a spring/summer jacket, a fall jacket and a winter jacket anyway, now they all come with a wearable computer built in.  The huge problem is to make them fashionable in the first place.<p>As for air travel I fail to see the problem.  Take off your shirt and send it through the x-ray machine together with your shoes and jacket.  Problem solved.