The first notable use of a cover which turned a device on and off was Apple’s Smart Cover. Since then, the idea has remained in the possession of Apple, give or take a few imitations. Well, as it turns out, Google may have a secret up their sleeves. So get ready to see the Nexus 7 Smart Cover.
I should explain that this is merely speculation following a video on Youtube showing that the Nexus 7 has magnets in the bottom left which turn the device’s screen on and off. It’s unlikely that Google are planning to follow this up, after all the last thing they need is Apple attacking them for something else. However, we could soon see some attempt pop up on eBay.