Smart phones are changing how people use "web" resources. For the first time ever, daily time spent in mobile apps surpasses desktop and mobile web consumption, according to Flurry. Also, it took less than three years for native mobile apps to achieve this level of usage. Mobile apps used more than web
All of that is going to significantly change the ways people use applications and devices, from navigation to web behavior. For starters, smaller screens and out of the home usage mean that the types of information people are looking for, when mobile, are different from desktop modes. More purposeful searches are one example.
When out and about, people are more likely to be looking for someplace to go, something to do, places to eat and drink or shop. So one consequence is that mobile users are more directly interested in commerce apps than PC users. The latency between search operation and "buying" is more direct, and more frequent.
That explains why there is so much more activity around mobile commerce, mobile payments, mobile banking and mobile wallets.