Along with the cost associated with buying a new TV, the link below outlines another reason why we don't upgrade and have the latest all singing, all dancing, 'smart 3D TV' (with a built-in camera)
"Samsung is warning customers to avoid discussing personal information in front of their smart television set.
The warning applies to TV viewers who control their Samsung Smart TV using its voice activation feature.
Such TV sets "listen" to every conversation held in front of them and may share any details they hear with Samsung or third parties, it said."
Not in front of the telly: Warning over 'listening' TV - BBC News