As apps and websites become optimized for mobile commerce, and as the "credit card problem" is addressed (see TheFind and Jumio), there will be more buying on smartphones. Most retailers and brands currently assume smartphone transactions happen on the go or in stores (or on other devices). In the home e-commerce is supposed to be the domain of PCs (and increasingly tablets).
The conventional wisdom is that smartphones are more heavily used for shopping out of home and that's been supported by prior survey data. Yet data released yesterday by Nielsen tell a somewhat different and more nuanced story.