Personally, I'd be quite interested in a 'retina' iMac, or one with a higher resolution display. However, I really don't think we'll see one this year to be quite honest. Maybe.
Considering the difference in price between the with/without MacBooks, I dread to think what it'd add to the cost of an iMac. The decent version of the 27" normally retails for about £1650, or thereabouts. Would you really be willing to pay, say, £2500 (or even a bit more) for the same spec with a retina/HiDPI display? Fair play to you if you would.
Thing is, even with this Unicorn-powered display, what are you actually going to run on it to take advantage of its magical DPI? There's only a few compatible apps available and a couple of games. It'll take the best part of the next year before we start seeing a decent amount of software that natively supports higher resolutions. And God only knows when Microsoft will update Office....
It's like being an early adopter on 3D TVs, it's awesome, but you've spent £5000 on a telly and there is (or was) only 3 compatible 3D films to watch on it!!
Higher resolution displays are obviously the future, and Apple are going to be at the forefront, but I'm not interested until the software's there to support the displays. So yeah, even if there's a 'retina' iMac tis year, I personally wouldn't be interested. I think I'd rather go for a full spec Mini until it's worth making the 'retina' upgrade in a couple of years.
