As far as his virtuoso repertoire goes, he can also boast with a DVD (or more ones) of the complete set of Chopin/Godowsky etudes, as well as with 2 successive recitals in which he played all of them by heart, I believe in Italy. (I must note that I have never seen that video, although I'd LOVE to.)
Although I admire him for his fantastic technique, sometimes I think his playing is rather cold. He's very much like Berezovsky; few of his performances are just jaw-dropping and better than anybody else (eg. the 1st video you attached, thanks a lot for that!), while other recordings reveal an insane technician, rushing through all the notes with frigid virtuosity (eg. his Totentanz). But don't get me wrong; as I said, I admire him, just like I admire Berezovsky, too. Simply in his playing I don't feel the profound virtuosity of Hamelin, nor the artistic virtuosity of Cziffra. He's somewhere between the two.
By the way, here is a video you're quite eager to see I guess:
http://www.youtube.com/watch?v=5B_X_DqGJl0That's a very good one.