wouldn't it be KICK ASS if they bring something like that back, but of course in today's Apple Style Scheme (you know, the lines, the translucency, etc.)
But I don't think a LCD iMac would be some big suprise as they had already maken one before. Also, the price now-a-day has been droped and it is not hard for them to re-build a new LCD iMac.
I think there would be some other cool products but the LCD iMac wouldn't be a big suprise (except they put some new idea on it).