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Panasonic Corp. is also including a track pad and a microphone on its new remote _ though it faces similar challenges recognizing commands. A voice command for “Breaking Bad” on video brought up Google search results on a Web browser, as opposed to opportunities to watch the show.

LG Electronics Inc.’s newest “Magic Remote” controller was incredibly precise in directing where an on-screen pointer should be. It uses Bluetooth wireless technology along with a gyroscope inside the controller itself. It worked even from a great distance or when facing in the opposite direction.

LG’s voice command worked well in searching for programs on live TV, Web video apps and even the broader Internet. When an attendant pressed the voice input button and spoke into the microphone on the controller asking for “Channel 5,” one of items presented was the Bing search results showing the website of the Channel 5 TV broadcaster in Las Vegas.

When asked for “The Dark Knight Rises,” the TV showed that it was available for rental or purchase on-demand through the Vudu online video app and brought up that app on the TV.

Another feature demonstrated on an LG TV was a way to mirror what’s on your smartphone or tablet with the TV. Using what’s known as “near-field communications,” an attendant touched his Android phone to a kind of sticky pad that was stuck onto the TV stand. After interacting with the chip inside the pad, the phone was paired with the TV. The phone then brought up two arrows, one for “Phone to TV” and the other “TV to Phone.”

By swiping up for “Phone to TV,” whatever was on the phone then showed up on the big screen. Swiping the other way brought out a set of controls for using the phone like a remote control.