I think these results were slightly biased because questions seemed to have been chosen to trigger Google search infobox results.

BTW, I worked with Knowledge Graph last year when I consulted at Google. It is an incredibly nice project. The team, who helped me when I needed help, was great - constantly improving the platform.

I am also using the IBM Watson APIs right now while helping another customer, so I feel like I am getting a broad view of what is available.

I expect that Knowledge Box, Cordova, Siri, IBM Watson, etc. are all going to get much, much better in the coming years and will change the way most people use computing devices. Exciting times!