The latest social media showdown could get ugly. Like oil and water or like peanut butter and jelly? Google+, the search giant’s new social network, has everyone in the tech industry speculating about whether it’s “the Facebook Killer.” The death of MySpace seems to prove that people have room in their lives for only one social network, one profile page. After all, how many different places do you need to announce your favorite TV shows? How many different places do you need to share your witty thoughts?