One of my favourite features in iOS 5 has been the Reader. This feature strips the usual distractions on web pages (advertisements, widgets, badges, etc.) & provides the reading content in an easily readable format. The same distractions that fund the free content on the web. Another disruptive feature that will have an impact on online advertisers.

It has become my most used new feature on iDevices quickly. And nowadays, I have started missing a similar feature in desktop browsers as well. Got to check on one of those add-in or extensions.