I just came across this feature and found it really cool.
I wanted to restart my timer on a task, but wanted to do it from the footer instead of having to navigate to the task page. I wanted to make sure I was starting the timer for the right task and just as I was thinking "it would be cool to be able to see what the task is," I rolled over the task number and the title of the task appeared. So cool!
You guys think of all the cool little things that make this app, that much better!