This is more for blog or magazine-type sites, but many of these sites are experimenting with dropping the sidebar all together. This allows for a more visual impact with content (and easier responsive Web development).
Imagine this: you reading an article without things flashing, crowding, or otherwise buying for your attention. Designers understand this and are working to make your reading experience more pleasant by getting rid of these distractions and expanding the content of the article to take over the page. Not sure about you, but this is a welcome change and a trend that we hope is here to stay.