As far as my feelings on Ico to Amy goes, aside from what everybody else has said, I'm happy to play the game for the Ico-esque vibe I'm getting from it, but it's not visually interesting to me at all. In fact, if you had shown me the game footage without telling me it was called Amy, I would have immediately assumed it was I Am Alive, which it looks very much like, and the latter is the one I'm looking more excited for than this.
Don't get me wrong, playing a little girl or an older woman (I would be more intrigued to play the little girl than I would the woman, just because if you wanted to keep an Ico vibe over it, the player you should play should be the one who knows less about what's going on than the one who knows everything), would be kind of fun, but the visual style isn't really bringing me in at all.