Took this thread absolutely no time to jump off the deep end, did it?
Expect a 2013 iMac no earlier than WWDC, and probably later than then. Last year when Intel was saying Ivy in January, they meant April. Now they're saying April for Haswell, so June/July is where it's at.
It may be even later than that. Haswell is highly optimized to be better in mobile contexts ( much better power management). In the past, Intel released the desktop variant first (and higher TDP mobile variants). Then the more mobile variants later. There is at least even chance they will shift so that mobiles come out first and the desktops are later in the schedule. Therefore, if the whole Haswell release slides backwards then desktops being toward the tail end could slip into July or later (based on same set of
delays from this year).
Note what someone at Intel said yesterday at IDF
"12:45PM - Haswell is mobile focused first, eventually into desktop/workstation and server "
http://www.anandtech.com/show/6260/intel-developer-forum-2012-dadi-perlmutter-keynote-live-blog
Given laptops are an increasingly bigger sector than desktops, it would be more aligned if Intel launches new families first on laptop and then move to desktop and then only much later workstation/server models.
Much of the initial "deep dive" into Haswell was spent on the integrated graphics and power management
http://www.anandtech.com/show/6263/intel-haswell-architecture-disclosure-live-blog
The GT3 integrated graphics option is primarily targeted at the mobile variants. The desktop options are largely capped at GT2 since those folks will more likely supplement with PCI-e graphics cards. There is useful desktop stuff there (new, faster L1 & L2 caches, AVX2 , better Turbo management , transactional memory access , etc. ), but not getting eaten alive by ARM tablets is the greater long term threat.
There should be at least one Retina model.
If the reports about the iMac delay being pinned on the 27" lamination process being a problem I wouldn't count on Retina any time soon. A display that can put 4K UHDTV ( at 3840 x 2160) on the screen perhaps but "doubling" just for doubling sake seems like more of a gimmick than useful. Unless folks are trying to push their iMac to the other side of the desk it is pretty close now.
The wild card would be some kind of event in China that somehow prevents the 2012 iMac from launching in 2012. We're in the 0.1% range here. In that event, they'd probably launch it in February and hold back the 2013 until October-ish.
China? Any silly country that blows up the world economy could put a delay on the Haswell launch. It doesn't have to be China. If Congress manages to blow up the USA's credit rating this Winter, it could very well be the USA that does it. Some other EU country threatens to blow up the EU. Iranians stirring the rancor pot in their region. etc. etc. It isn't just China.