I will personally wait until tomorrow afternoon and find out, side-by-side with my iPad 1.
Unless there is some programming wizardry involved in the apps that allow for smart scaling, it can't look the same. We all know what a native iPhone app looks like in 2x mode on an iPad 1/2. Any time you make an image larger, it gets blocky. If you merely turn each pixel from a legacy iPad app into 4 pixels on this display, it will look bad.
If the hardware instead does some sort of real-time interpolation (like DVD upconverting in a blu-ray player), then it would look fine. But that takes some horsepower.
You do realize there is NO LOGICAL nor TECHNICAL basis for your opinion?
The display will look EXACTLY the same when held at the proper distance from the eyes. It is PHYSICALLY impossible for it to look any different. The reason for this is simple. The pixels will be shown in the same exact position. The new density does not take up ANYMORE space than the original pixel did.
So that means a 1024x768 PNG graphic will look 100% the same, no if, and or but.
Now, the first thing everyone is going to start saying is "BUT BUT it looks different"! Well duh! Apple has already updated the graphics for all of the their apps, plus the text rendering engine has been updated. Which is why iOS developers where never given a final GM build of 5.1 to test. It would have given away what they were doing.
So any app that has TEXT that is using the standard API calls will look better because they are going to be RENDERED better. But on non-Apple apps that have graphics, those graphics are not going to change one bit until the developer updates them. Which means you are going to see no difference other than the text.
Of course the next argument is, but WEB BROWSING looks better on certain pages! Again, WELL DUH. If the graphics were meant to be displayed on a bigger screen but the iPad interpolated it to fit on a 1024x768 screen, it probably won't need to do the interpolation anymore which means you will see the original graphic as it was meant to be seen.