At CES next week, LG plans on announcing the Smart TV Upgrader, but they've given us a sneak-preview today. What does it do? Basically, the add-on upgrades non-"smart" TV sets with DLNA, apps, plus a web browser.
Seemingly, Smart TV is a rebrand of LG's NetCast system—an internet-connected TV service with a home dashboard, displaying apps and widgets. Considering NetCast offered Skype, YouTube, Netflix, VUDU, and Yahoo Widgets, we shall expect more of the same.