It was cute. Mostly. If you're jonesing for Chobits, in particular, Chii, Sumomo, and/or Kotoko, this is a fine, quick fix of kawaisa. It's more of the panty fetish, which seems to be a big thing for the anime writers.
However, and let me preface a huge caveat with this: I love Sumomo. Dearly. She's as cute as a button and I'll be the first guy on my block to get me a little Sumomo persocon when they come out.
BUT - if I EVER saw Sumomo or Kotoko with the horrifying expressions on their faces at the 4:30 mark, I would have no other recourse, but to burn them both, with a Eucharist wafer stuffed in their mouths, and a wooden stake pounded deeply through their adorable little hearts.
And, having seen them like that, and knowing they're even capable of such a look, it's kind of hard to forget it and go back to adoring them. What has been seen cannot be unseen, and all that.
Why CLAMP would sign off on those four seconds of animation is utterly beyond me.