I have a maxed out 2017 MacBook Pro 15 and need a new external display. But those LG's are SO EXPENSIVE. I can buy a maxed out late 2014 5K iMac for just a few hundred dollars more. I would just use the iMac when I'm at home and the MacBook when I'm at the office or out since I know you can't use an iMac as an external display anymore. So I guess I'm asking if the LG Ultrafine 5K has a better display than the late 2014 iMac? If they're comparable, then I'll definitely just buy the iMac. But of course I'll wait until after the announcement this month as the used market will probably drop a bit with the new models coming out.