Flop: WebTV (Renamed MSN TV When Purchased by Microsoft in 1997)
In the mid-1990s, WebTV aimed to bring the Internet to people's TV sets via a subscription service, a set-top box, a remote, and a keyboard. It was a product ahead of its time.
Microsoft bought WebTV in 1997, but the service (and hardware) never got much traction with consumers. Microsoft subsequently changed the brand name to MSN TV, but it no longer sells any related hardware--though it does support customers who have kept their subscriptions.