Right now if you are using your list view on activities if you want to get more information about that specific deal, person or deal you have to look the column and then make a click to display this information in another tab. This is time-consuming and most important of all it keeps preventing the sales rep to make decisions, by that I mean... 

Is this deal worth Chasing for? , what do I have to do next to keep moving the deal forward or closing?
In the list view, the focus of the sales rep is guessed what Activity? 

I create a video to explain myself better stealing a wonderful idea from the leads tab.