Many of you have have heard about Nvidia DSR (Dynamic super resoltuion). If you havent then check this link. Long story short, it helps to render games at higher resolution by supersampling an later converted to your screen resoltuion by downsampling.

Source: http://www.geforce.com/hardware/technology/dsr/technology

Now you can play games at 4k resolution in your 1080p monitor / TV. Its a nice technology. Nvidia really did a great job. Games looks really great.

But here comes the question of anti alising. At 4k anti alising looses some of its value. Becaue the main purpose of anti alising is to remove the jaggies. Now with DSR you can get 4k sharpness and it kinda nullifies the job of anti alising. I know anti alising will stay but with improved resolution anti alising wont be as important as past.

DSR stands for Dynamic Super Resolution and not Dynamic Screen Resolution loll

Correcting.

Depends how demanding this DSR stuff is. The reason we use specialized AA techniques rather than simply super sampling everything, is that the latter can sometimes require several times the resources to achieve an IQ similar to something like 4xMSAA.

Regardless, it's nice having it as an easily accessible feature. Most games don't natively support SS.

The biggest issues is that DSR is more demanding than most AA solutions.

There is 3rd party software that can do this for you. It's really handy downsampling from a higher resolution when you have an overhead for more performance, looks so much better.

Don't fall for the BS marketing fud.

SUPERSAMPLING is actually the purest and amongst the most costly forms of anti-aliasing.

Anti-aliasing basically renders "just-alike" pixels to fill the steps between pixels. These pixels are naturally of a lower quality but the effect is that you get a smoother jaggies free image. Supersampling/downsampling is a way of rendering the image at a higher resolution that what is supported by your display then shrinking the bigger image with more pixels to fit into your display. Basically, your 1080p (or whatever) is displaying a higher resolution image resized to fit your screen.

Typically, if SSAA is done on the software side, that means that a GPU would natively render an image at a resolution higher that your displays native resolution then shrink it to fit. Very GPU intensive. What Nvidia is claiming here is a hardware approach. That wil upscale the image the GPU spits out then downsample the upscaled image and output that at yo displays native resolution.

Thing is, you GPU is still only rendering a (eg) 1080p mage. And what you are output is a downsampled 4k image of an original 1080p image. Kinda silly if you ask me. It would probably be equivalent to like free FSAA and nothing more

Wait... the GPU is not rendering in 4k? Pretty sure useless.

According to description, they are rendering at 4k: "At 3840x2160 (4K), the number of sample points is multiplied by 4, enabling the game to capture and render more detail on each blade of grass.", 

And then downsampling do 1080p: Finally, DSR applies a custom-made 13-tap Gaussian filter as the 4K image is scaled back down to 1920x1080 for display on the monitor:

But I agree that is only justa a high demanding and naive anti-aliasing method.

1) It still doesn't look nearly as sharp as the actual 4K resoulton.

2) I kinda don't get why some people think this is a big deal.  In AMD's control panel you have been able to apply "Supersampling" for like a decade now and it does the same thing.