By 2015, more than 28 million people will be using home-energy displays to keep track of their usage, according to a new report from Pike Research. The study went on to say that about half of those users will keep tabs on energy consumption via an actual display in the home, while about 11 million will monitor usage via the Internet and an additional 2.6 million will check their efficiency from mobile phones. CNET/Green Tech blog (12/10)