Not to mention you couldn't game at 5K or do very much at all at 5K, need to scale it down so what's the point of having that many pixels anyway?
I wouldn't bother arguing with this guy. He's clearly been taking it from behind from ATI for a while now...
And with Nvidia GPU you could game on 5K display?
EVERY benchmark that is in the internet shows that with getting resolution up, the better GPUs for handling it are the ones from AMD. Performance gap between Nvidia and AMD is big when we compare 1600x900. With every step up: 1080p, 1440p, and lastly: 4K, it erodes. In some games, at 4K AMD GPUs are simply faster, because they have more horsepower underneath their architecture tu push pixels through display. And there are coming 3XX series which will be even more difficult for Nvidia to keep at that resolution.
P.S. Every computer I have had in my life have had Nvidia GPU, and I have right now 6th computer.