I have heard through industry contacts that the new Imac may be an interesting hybrid of desktop PC and tablet. I have seen designs floating around suggestng that an upcoming Imac concept is to have a panel screen with all of the inards which also has a battery that can then be simply lifted from its stand and be used like a panel. It appears som recent patent work showing conductive power supplies are for this exact application. Dependant on different people i seem to speak to, some say that the optical drive woul be based in the stand and some say it would be in the rear of the screen base, but lots of people are saying that you could have multiple base stands in one location and dock the unit whereever. I also presume that the Imac would need a mobility processor for energy efficiency to do this and that i can only guess it would come from the latest MacBook Pro's. One guy who had been given more information did think that unit might be the 2nd coming iteration not the most immediate imac replacement but i dont know.