Last year, the FAA commissioned a study of the issue by representatives from Amazon, Boeing, the CEA, FCC and others. Word from industry insiders say that the results of the study should be announced by July 31st, and the FAA is hoping to announce a relaxation of the rules by the end of the year. It's unclear what devices will be included as acceptable, but it has been made clear that cellphones will still be banned. But, it seems likely that at the very least tablets and e-readers will be allowed as long as they are in airplane mode.
This seems like the least the FAA can do, since it has already given the approval for pilots to use iPads in the cockpit, and flight attendants can also use tablets of their own throughout the flight.