Depends on what you saw. Two different things may be called a "surround speaker". The first is simply a speaker designed for use as a surround channel, which usually means it is bipolar or dipolar. The second is an "all-in-one" speaker which sits on top of a TV and simulates a complete 5-channel setup (sub is still separate) by itself. Whether or not something like this would work for you depends on both your room and your tastes.