Sony Ericsson’s Connected Tree answers that age-old question: “If a tree tweets in the forest and no one is there to hear it, does it make a sound?” The tweeting, talking tree is being shown off at Mobile World Congress in Barcelona, and you can check out a demo video of the live and interactive orange tree in the video below. It may not be the first plant to master Twitter , but Connected Tree offers a unique motion-sensing interactivity with the people around it. It picks up changes in the electromagnetic field nearby as people approach or move away, and an attached analysis engine translates the tree’s “reactions” and “moods” into speech, tweets and SMS