This simple adapter by Komodo allows you to screen mirror everything on Android, from the OS to Games and Movies. Sure its not wireless, but it is only around £5 which is a bargain. Check out the video review of this adapter using a Sony Xperia SP. It also works for a large variety of Android phones and tablets for full screen wired mirroring. This makes your Android device a great potential retro game console.
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List of Compatible Phones and Tablets (Basically any with a 5 pin micro USB):
HTC: EVO 3D, One, One S, One X, Sensation, Sensation XE.
Samsung: Galaxy Nexus, Galaxy Note, Galaxy Note 8.0, Galaxy S2.
Sony: Xperia SP, Xperia T, Xperia TX
Please Note: This will not work with Samsung Galaxy S3, S4, Note 2, LG Nexus 4 For an S3 etc model click here