Of course, broadcast networks aren't immune from reviving sitcoms. Some acquire shows dropped by other networks, while shows that may be cancelled—like Family Guy—are brought back by popular demand.
In addition, as online players become more competitive, broadcasters are competing with their own online subscription services.
"We might start to see broadcasters reviving shows on their own digital services — so as viewing shifts, it will become a more attractive option for shows which are popular, but not performing well enough to keep them in their traditional broadcast slot," says Broughton.
How many people use a broadcaster's subscription site is crucial in this decision, to avoid the risk of jeopardizing their relationship with existing TV customers or the show's commercial success, Broughton adds.
Sometimes TV show revivals return as a movie, however, this may not be desirable for streaming providers as a 'one off' film typically costs more than a series, but the latter could generate more subscribers in the long term.
Crowdfunding may be a preferable approach for this, taking the "Veronica Mars" film as a successful example. However, Netflix helped back the making of "Crouching Tiger, Hidden Dragon: Sword of Destiny"; a sequel, but then faced contention with theater firms over distribution.