People who search for mobile businesses on a mobile or tablet are more likely to buy

"Mobile searchers closer to purchase: “Local business searchers who used a mobile phone or tablet were more likely to make a purchase as a result of their search. While only 59% of PC searches resulted in a purchase, 78% of mobile phone searches and 77% of tablet searches resulted in a purchase. Tablet searchers also skew toward more expensive purchases.”"
Source:  The comScore, Neustar/Localeze and 15 Miles local search study, reported in Screenwerk, 1st April 2013

Note - It's not clear whether this means buying online, or in person in physical store