You know, better battery life! Wait...
(Real life: huge discount when buying same chip for both desktops and laptops...)
Except they don't use these chips in any of their other computers so I doubt they got a huge discount because of using the same chip in multiple computers. AMD chips however, tend to be cheaper..
I was kind of hoping for a new design, but I guess it's hard to improve upon perfection. Anyway, this is great! Y'all can beta-test these expensive iMacs for now, and in 2-3 years I bet the old 27" will be gone, and the range will be all-retina at today's prices, possibly with pure SSD - and that's when I'll upgrade!
However, I can't help but noticing the decline of iMac sales here in Sweden. The used market reflects this as well. On our equivalent of Craigslist, I've seen the 2013 27" model sell for around 55 % of MSRP. Not only that, but I found a 2011 27" model for as little as a third of its retail price in 2011. These were no scams either, they reflect the general price level. Seems like most people don't want iMacs anymore. Oh well, the better for me. I might just pick one up sooner of later and upgrade to the 27" while waiting for the Retina-model.
When those options come standard, there will be new technologies on the market which will drive for CTO options - and you'll want them too after seeing how good they are. It's easy to think "Oh if they only came with SSD standard I'll buy one" but you'll think they same with new technologies "Oh if they only came with SuperSSD standard I'll buy one".
Are you referring to Blocket or Tradera? Haven't checked the prices of used iMacs for a while.
The CPU seems fine for the job, but when the r9 290x desktop GPU has trouble handling a 4k display a mobile variant is definitely not the answer to a 5k display. The smart choice would've been using the recently announced gtx 970 for base, and 980 for the higher tier.
Using a GTX 970 would have been very weird and unusual. They've never used desktop variants in the iMac, on top of that it would also generate more heat and noise due to more fans.