The dlna (digital living network alliance) is a standard being used by manufacturers of electronic media devices, which allow them to interact with each other.
Your flat screen would be able to play media or other content from your laptop or other device across a home network. A person could buy a device of any brand and also be sure that those devices would work with each other, seamlessly.
As of August 2009 there were over 5,500 devices certified as being dlna compliant. So the next time you are out shopping, make sure that the device you are looking for is dlna compliant.