IMac ?

Yes, refreshed iMacs are likely to be released within the next month or so, so it would be worth waiting if you can (of course, nothing certain except death and taxes).

 

no one knows for sure.
Remember this; there are three people who get tech:
The people who get it when it first comes out: then complain about issues and (sometimes) price drops
People who get it at the end of the cycle: Complain when a new one comes out
People who get it when they want/need it: This is where I fall, I just purchased it when I wanted it and dont care really. I have a great machine.

Get the iMac when you need/want it.
The current iMac is a beast (quad core, 32gb of ram thats cheap, great graphics, great display, and lots of storage)

 

It really doesn't matter if new machines are coming, they are always new computers on the horizon. If you buy today all that matters is will the computer do what you bought it for well and will it work OK in the next several years. I'm typing this on a 4 1/2 year old iMac that works as well as it did the day I bought it. It suits my needs fine, however if I made my living using the computer and needed the speed, graphics and port improvements that have come out over the years I would have upgraded. In short you need to evaluate what your needs are.

Apple does not pre- announce new Macs, so if you want and/or need a new computer then buy today. If you don't want/need a new one then you can wait as long as you like. To be a little sarcastic you can wait until 2020, those machines will be better than the 2012's.

 

Yes, which is why I noted nothing is certain except death and taxes. But based on Intels 2012 road map, the age of the current iMac, and also the MR Buyer's Guide, it's more likely than not we'll see new hardware in Feb/Mar.

True, but if you are in the market for a computer right now and there is good reason to believe an updated version will be available in the next month or so and your need is imminent but not immediate then, yes it does matter because it makes zero sense to pay $1700 for a 2011 model today when, if you wait mere days or weeks you can get a 2012 model for the same or similar money.

 

No. Simple as that.

 

No, iMacs tend to be more powerful than many of the All in Ones around its price range as other manufacturers tend to use mobile CPU's. If you compare it to a desktop at that price it's not a fair comparison since the iMac is a) thinner (you sacrifice power to get there) and b) has a screen that could cost as much as £700+ on its own.