I'm really struggling to see the real benefits over windows 8 as attempted to be defined here. Most if not all these features outlined by the author are already available in Windows 8 in some form or fashion. I detect a hint of bias in this article due to the lack of objectivity.
1. Why would I want the amazon search feature? If I want to search amazon content I include the amazon keyword in my google search or I go to amazon's site. Going to amazon's site is not that hard. This amazon search feature is not necessary and does not add any real value in my opinion.
2. Dash Previews. I invite the author to right click a file in the search results of ANY recent windows versions and see how many options he is presented with.
3. Interface based on efficiency. I don't think I get your point here. Are you saying that having to use the mouse as well as the keyboard while doing work will make your experience inefficient?
I could continue but it's all in the same vein. UBUNTU 12.10 is comparable to Windows 8 to say the most. It definitely does not 'blow windows 8 away'.