Up until now, I haven't really recommended the otherwise excellent (“thanks” to Apple's overly strict and - in my opinion - when it comes to video playback, absolutely unnecessary restrictions, jailbreak-only) XBMC multimedia player for iPad 3/4 users playing back high-resolution videos.
The reason for this was, as has always been explained in my articles, the lack of Retina screen support.
Now, take a look at the next two screenshots (click the thumbnails to get the original shots! Don't even try to evaluate the video playback resolution using the thumbnails):