The new iMac will have a slight U-shape - so more of a jaw than a chin!
The
logo will be bigger enclosing a 2.5" secondary screen (an Intel idea called Newport) used for checking emails, calendar events, and even maybe play iTunes without having to fire up the whole computer as such.
Apple will announce "the green way forward" with such measures.
An iMac that neednt be turned on all the time would cut energy bills. Also certain info could be beamed wirelessly to other devices such as
TV whilst in "green" mode.
Sorry to spoil the surprise but I think you should be the first to know!