Incremental upgrades are the most Apple will put in the 2012 iMac. My predictions:
CPU = Ivy Bridge upgrade is a given
GPU = Upgrade is a given, Apple will probably use an AMD 7xxxM chip
RAM = Sticking to 4GB standard
HDD = Will probably stick to similar standard of 500GB on the low end and 1TB moving up the line
SSD = Still a BTO option as SSD prices are still too high for Apple in ship as a standard. A possibility is an SSD with HDD combo where SSD is very small in size and only for installing OS and apps, something like a 60GB SSD but the cost for that is still too high. Lower cost for a BTO SSD option, don't count on it as prices are based on market value.
Bluetooth 4.0 = Strong possibility
USB 3.0 = Medium on the possibility scale. Apple is backing Thunderbolt but may add USB 3.0 support as it's included in Ivy Bridge by default.
Redesign = Ha ha ha, yeah right. Don't count on it in any capacity. This is nothing more than wishful thinking than based in any kind of fact. I'm sure Apple is working on future iMac designs, it's just that the next upgrade will not be a redesign.
Announcement and shipping/release = Summer, no earlier than June. If anything, MacBook Pros will be the first to be upgraded and shipping with Ivy Bridge and that might be in April as soon as Ivy Bridge is shipping from Intel.
Mark your words and use some logic?
Man you sure know how to make me laugh. Don't tell me that I ever need to use common sense and logic as I'm not the one who needs to make my writing a little more coherent and logical. To quote a wise man, "Check yo' self before your wreck yo' self". People and their rumors on a rumor site...
I'll take that bet. How about the loser publicly apologizes to the winner on this thread in a few months? We can start in April when you think the iMac upgrade will be released. If it doesn't release, you owe me the apology, if it does, I'll apologize to you. Deal?
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The next upgrade will probably be another incremental upgrade so don't expect an increase in price.