For most people Google’s Chromecast (a dongle that lets you display video from computers and tablets on a TV screen) was their most enticing product announcement on Wednesday. But those announcements included the news that digital textbooks will be added to the US Google Play store in August. Google will join Kindle, Nook, iBookstore, CourseSmart and others in providing “a full catalog of higher education titles in math, science, history and more” for purchase or rental. For now they make the same claim as Kindle and others on pricing — that digital rental can provide “up to [an] 80 percent […]