TechCrunch : Most TV commercials are poorly targeted and show things you’d never buy. But not for long. Gracenote‘s new ad replacement system combines viewing habits with personal info to show you more relevant commercials. Gracenote will demo it at CES and start trials in 2013. The rev-share is still in talks, but higher CPMs could enlarge the $70 billion TV ad market and give Gracenote and partners a nice cut.