The broadcaster did not give details of the speech or upcoming announcements by CBS Chief Executive Les Moonves, who will give a keynote address on Tuesday at the Consumer Electronics Show being held here.
Sling is known for its Slingbox, which plugs into a TV and transmits the feed via the Internet, allowing consumers to watch their favorite local TV shows no matter where they are. It also has a new device that does the opposite, putting Internet content on television.
San Francisco-based Linden Lab's Second Life is a three-dimensional virtual world with more than 2 million registered users.
CBS, like many rivals, makes its shows available both for free and for a fee across the Web, on sites including Google, YouTube and Apple Computer's iTunes.
Connecting computers to TVs is high on the agenda at the annual Consumer Electronics Show, where a flood of devices aiming to do just that will debut this week.
Such devices have been the long-promised goal of the media and technology industries, but past efforts have failed primarily because of cost and usability.
Sling is funded by a mix of financial and media investors including Allen & Co., Goldman Sachs, Liberty Media Holding and EchoStar Communications.