Bleh... 11.1" screen... I understand wanting to make it portable, but not at the cost of screen space... otherwise, why not a pda? I'm not in the market for a pda. I think 12." is kind of a minimum, and 13" sounds sweet if they can keep from losing vertical lines (for word processing, height is more important than width). Take the current 12" iBook... there is quite a bit of a "thick" border of plastic frame around the display... I think it's probably doable to thin that out a bit in favor of a larger screen (the 12" PB, thinned it out, but that was in order to get the whole thing smaller, not the screen larger). Personally, for my uses (lot of word processing), the current 12" size of screen is the minimum, so the 11.1 Vaio doesn't do it for me.
It's nice that the Vaio is so light, but again ask at what cost - if at the cost of the screen, that's a no go. There was an interview with Steve Jobs in Newsweek, right after MWSF, and Steve said that they kept the same form factor on the iMac and MacBook, because they think it's optimal, and can't think of any way to improve it.... seems to me, it's very likely that you'll see the same with the iBook - unless they really do come out with the 13" widescreen iBook. Sure, I think they can make a DVD burner standard in the 12" iBook, make it faster with a better bus, but I honestly don't anticipate being blown away by how much better the new intel iBook will be compared to the current 12". As for the Vaio, color me unimpressed.