I am too lazy to download and install the opera reader, but it's definitely interesting.
I think there might be some misconceptions with “Books are much easier to handle than scrolls.” which is indeed true, but only because you have to scroll manually with real scrolls, which requires two hands. On computers it is a completely different story.
I can see some advantages with paged webpages however, such as saving bookmarks. And there might be some page layout advantages.
I think it should be asked, is it easier to browse the internet as it is now or is it easier to browse the internet as slideshows?