It looks like I've been right that LG are the ones to watch coming into this year and especially 2014, with the South Korean company reportedly preparing an always-on, voice-controlled, buttonless smartphone for 2014.
The new smartphone would feature technology that would respond to only the owner's voice, and would just require a simple "hello" to begin processing voice input. The issue is going to be separation of noise, such as general conversation, road noise, and more from actual voice commands to the phone. The other issue is battery power and heat, as the phone would be in some form of "always-on mode" in order to be constantly listening for you to say "hello".
According to GottaMeMobile's sources, LG's always-on technology won't be as lavish as Google's or Apple's, but they've focused on a single context: navigation. With the user not having to touch or press the phone, they can pan and zoom in Google Maps just by their voice. LG's new buttonless, always-on, voice-controlled smartphone would be powered by Qualcomm's benchmark-breaking Snapdragon 800 SoC, which can supposedly deliver the always-on goodness LG needs without serious drains on the battery.