Sony's latest KDL-R550A sets and Panasonic's DT60 have integrated near-field communications (NFC) that allow you to tap your NFC-enabled smartphone or tablet (no Apple products have NFC) to mirror what's on the set or bring up related social content.
An upgrading alternative
Smart TVs are expensive, so Samsung has come up with an interesting product to let you upgrade your existing TV without buying a new model. (Cleverly, it doubles as a way to make money from TV buyers between new models.) The Evolution Kit is a black box on the back of a Samsung smart TV that you can replace to upgrade the TV's software and some specifications.
The company didn't announce a price for the upgrade module, which was first announced at last year's CES, but says it will be available early this year. The box can update your software to add the newest features and improve your processors for a speedier TV experience. But it can't upgrade the resolution of your screen.