I'm starting to warm to the idea of getting a 4K display. It seems everywhere I look they get recommended to be used with Macs (probably because Mojave is Retina-optimized). Plus they have that handy USB-C/Thunderbolt connectivity. I do multitask and often if not always have at least 2-3 windows/tabs open that I need to look simultaneously which is very difficult to do with my current setup (iMac 21.5" 1080p). Still, I worry that there will be more cons than pros if I pull the trigger on a 27" 4K display. Will the fonts/websites be too small? Will there be any other advantage to 4K 27" screen other than crisp text if most of time I just browse, play Youtube clips (probably at sub-4K res as my internet connection is only 10M), do some word processing and some light AV editing stuff? Would a 25" 1080p-1440p do concerning my usage and result in a lot less scaling?
My current main contenders are the Dell U2518D (1440p) and the LG 27UK850 (4K). The LG would have all the bells and whistles (although, sadly, when using the USB-C/Thunderbolt connection the USB hub on the LG will only have USB2.0) and even the price point is acceptable. However, there are a worrying number of reports of people having backlight bleed in their LG displays. I previously thought of Dell U2718Q but it seems these are not Apple-tested displays and some have reported issues regarding this.