4. Smartglass
Many people probably won't use Smartglass, but it's certainly an interesting concept for bringing in a second screen with the Xbox One. Not near your Xbox? Use your phone or tablet to access Xbox Live, configure updates and interact with your Xbox One. Alternatively, give your pad to a friend and affect their gameplay by using the tablet. It's a direct ripoff of the Wii U's technology really, but if you've tried the Wii U, you'll see the mass potential in a second screen experience. It's not for everyone, that's for sure, but I think this is really intuitive tech that's great for an ever-growing market of smart phone users and tablet owners. We'll wait and see.