In a previous discussion, some claimed that DSR made 4K almost like obsolete, since you can get somewhat similar graphics resolution just using a regular monitor. No one would claim that DSR at 4K is better than true 4K native resolution, but their point is well taken. Either way, no one is going to seriously be playing games at 4K with a single graphics card, either with a true 4K monitor, or by using 4K resolution downscaled with DSR.