you forgot that DRM support will come on the DR and not on iliad
also did you forget the faster page turning and that the DR is only about 150g heavier than the iliad
and turning pages with this huge button was also recognized as bad by other user in this forum, because the button sometimes recognizes the pressing for page turns as something other input (dont know whats going on if you hold the button longer, but the iliad does something unwanted ^^)
and the size of the DR is a bit under the size of A4 not bigger
edit: i just saw that the DR should be able to show thumbnails
https://wiki.mobileread.com/wiki/IRex_Digital_Reader
and a last big point i saw in a movie on youtube, was to change the view on the DR to a overview of the next 20 pages in a document
so that you see little icons with the pages like the miniature viewing in windows
is this able on the iliad?
are you also able to connect ntfs formatted hard disks via usb to the iliad?