Tablets at Your Restaurant Seat

In Mashable:  About the use of tablets in commercial applications, such as on restaurant tables.  There seems to be much interest.   We experimented with similar set ups on grocery store carts for years.  Some of the learning could well be transferred.  Allowable content and capability often come up. Some shoppers we interviewed wanted to have full on-line  laptop capability: e-mail, open browsing, etc.  Most retailers were not keen on the distraction from the shelf.  Different environment at dinner.  Cost and security of the devices was often brought up.