Microsoft released Xbox SmartGlass for Android on Friday afternoon. Its Google Play description says SmartGlass is compatible with devices running Android 4.0 and higher, but the Nexus 7 is shown as being incompatible for some reason. Fear not, the magic of sideloading will install SmartGlass on your tablet with no issues.
The always helpful individuals at XDA forums have posted the APK for Xbox SmartGlass for everyone to grab. As long as you’ve enabled your Nexus 7 to install non-market applications (from the settings menu), you can download and install SmartGlass right on your device. I’ve installed the application, and it works perfectly fine.
Source [XDA Forums]