Inumaru:
Thanks for your input. I'm no musician by a long shot, so I was curious and wanted to ask about the very things you've already explained! Initially, I thought the blindfolded thing at first was fairly impressive (even if a wanky gimmick). Music-wise it was good, and you can't deny memorisation, but I thought that being blindfolded would make a piece that required many octave changes and stuff alittle difficult at least. Of course, you have opened up my eyes, and said that it's relatively no mean feat to do so for a pianist with a lot of practice, but I still think that the typing analogy is not entirely the same, as you say, the real estate needed to be covered is greater - that is, for a typist, the keys are qithin a few inches of a central position, but playing the piano (not so much the first part that guy did blindfolded, but the bits later, where his hands were changing fairly large distances - now had he done THAT blindfolded, perhaps....) requires jnowing how far to move your entire hand. However, you'd know better (having played piano before and such), but surely DDR is the same analogy as typing, and not so much the piano? The arrow pads are exactly where you expect them - maybe it'd be more akin to having four or five playmats at a certain distance rather than just one...or maybe using an onscreen keyboard device and typing your name blindfolded. Maybe, I don't know - perhaps good pianists get that familiar with the keys, you could get them to play any single not blindfolded on the first go.
I'd like to see someone play tetris blindfolded, with someone else narrating the pieces!