Bing, as we know, is slowly increasing their user base. You have experienced richness of Bing homepage due to background image which gets changed daily, and contains information about the place in the image .Bing also loads hotspots for images in blocks which describes story for that image.
Bing is engineered in such a way that background image,Bing logo,hotspots and explore pane which contains Images ,videos,Shopping,News,Maps and Travel loads in stages which may not slow down your searching in Bing.
you can turn off the background images on Bing to help faster your search in Bing,so that Bing will be with Plain background
To turn off Background Image in Bing
To turn on background images for Bing or to Show daily images for the Bing.