I just got my new iPad yesterday. While I didn't get it expecting it to be able to play the MKV files I have without conversion, I got pleasantly surprised when I tried some for fun today in AVPlayerHD!
I've always had to rely on Air Video and Handbreak in converting the my MKV files to playback on my iPad 2 and iPhone 4S. It was so tiresome I just got a Galaxy S2. You may remember me 
posting a thread about it before, complaining about the iPhone 4's inability to decode this format. I think that thread got me at least 100 downvotes...
So I made this thread to tell fellow anime fans still on the fence about the new iPad - it will play all your 720p anime you get in MKV, 8-bit and even 10-bit, with ASS subs without a problem! Here is a video of myself demoing it below!
YouTube: 
video
There goes my final reason of keeping my Android devices. They're going to TradeMe and luckily before the Galaxy S3 gets announced next month!