The 265 DPI resolution is indeed awesome. Take a look at
this photo I took of the screen. And then look at
this. Notice the fine pen line art on the screen and then notice their size compiare to the lines on the fingerprint mark on the black frame.
That said, the extreme resolution means that any comic where the pages are smaller than 1440×1080 pixels will look pixilated, since they have to be upsampled to fit the screen.
As you can se on this
side-by-side photo, the HD has a bit more screen area, something that really count when reading comics.
But even if the screen is somewhat bigger on the HD, it is still smaller than an ordinary pocket sized manga. Okay, the screen size is 6.8 inches instead of 6.0, but what does this mean? I took a ruler and measured the width and height of the screen area: 10,3 x 13,8 centimeters = 4.0 x 5.4 inches.
In the end, I have not done much comic book reading on my HD. So while it certainly is better for comic reading, its not a perfect solution.