Great concept, but noticeably large. It looks like a Life Alert device.

Thanks for replying Josh. But if I'm only shooting 4K to edit and deliver in 1080, would Premiere and AE still suffer that much on this computer even for 1080p work?

Also curious to know what how small 720p and 1080p footage would look on the iMac 5K Retina. Though the size of a 1080p frame is shown on the apple's web site, I wonder how pixelated or soft it would look playing back in full screen. Regarding 720p footage, if you upscaled it's frame to the size of a 1080p frame on the 5K Retina, would it look badly pixelated?

Also curious to know what how small 720p and 1080p footage would look on the iMac 5K Retina. Though the size of a 1080p frame is shown on the apple's web site, I wonder how pixelated or soft it would look playing back in full screen. Regarding 720p footage, if you upscaled it's frame to the size of a 1080p frame on the 5K Retina, would it look badly pixelated?

Curious how a maxed out 5K Retina iMac i7 would perform running Premiere Pro CC (October 2014.1 update with blue text). Someone here mentioned the lack of an NVidia graphics card as a potential problem for Premiere. I currently have a 2012 iMac i7 with an Nvidia GeForce GTX 680MX 2048MB. Wouldn't the AMD Radeon R9 M295X 4GB GDDR5 upgrade be a more powerful graphics card than mine? And wouldn't it handle programs like PPCC and AECC without issue?