Smart TV is the catch-all term for internet TVs. For many new TVs this means access to a collection of apps, an app store for adding more, a web browser and access to home network files all rolled into one interface. Latest TV's now connect to the internet and can be networked to PC's and home media storage drives.
Smart TV's now cope with many different connections to them, for example: Games consoles, Video surveillance, intercom systems, skype or VOIP connections to friends and family (these are video phone calls!), also main TV viewing connecting via internet, cable, satellite or conventional aerial. Smart TV's also can connect to your Home Hi Fi system for full enhanced Sound.