The 17" IMO is definitely not going away any time soon considering the price of Apple's 20" display is still $999 (the specs are better), so the 20" price cannot be low enough. Not all people even want an enormous 20" monitor on their desk let alone a 23" monitor. I would love a 23" iMac to marvel over though I would never buy one because of the waste of a monitor. 20" is the biggest I see practical for an all-in-one in the near future (not saying Apple will not come out with one 🙂 ). I am expecting speed bumps.