It's an interesting challenge. Lots of mobile devices that are all vying for the consumer pocket (and wallet). But just how many devices will consumers carry with them at any one time? The answer is important as that also helps define which devices will be successful and which ones will fail. Conventional wisdom holds that most consumers prefer to carry only a single device, and while that wisdom is correct it only tells a partial story. We've done some interesting research at Interpret that says there's more here than conventional wisdom would indicate and that consumers are willing to carry more than one device; however there's also an upper limit on that number.