So I've been reading that the display of the Retina iMac is far ahead of all the components of the computer, graphics card in specific. My concern is if I do buy the iMac with the 295X now, will the life span of the computer be shorter? Especially as technology advances and catches up to 5k, will the graphics card be able to hold its own (lets say... 5 years) from now. This will be my first iMac purchase and it took me a while to save for this. So obviously I don't want my $3,000 computer to not be capable in a few years, or even worse with another iPad 3rd Gen situation happening.