According to a recent survey of physicians:

• Among physicians who use an EHR, 75% use a smartphone and 33% use a tablet
• 51% of tablet-using physicians used their device to access EHRs, compared to 7% of smartphone users
• About 75% of tablet users are either somewhat or very satisfied with their devices
• About 33% of EHR users and 25% of non-EHR users use a tablet device in their medical practice
• Only 28% of smartphone users and 18% of tablet users were "very satisfied" with the quality of apps for their profession.

Source: "Survey of Physicians Suggests Tablets More Useful Than Smartphones ", AmericanEHR Partners Press Release, June 12, 2013, http://www.americanehr.com/about/news/13-06-12/Survey-of-Physicians-Suggests-Tablets-More-Useful-Than-Smartphones.aspx