I think this feature might be useful for fast reading the automation envelope just like in Logic Pro X.
For ex. on ReaEQ to visualise easily the (hz, dB) when we are automating the frequency or gain etc.
Yes, we can read easily enough by just hovering the mouse on the breakpoint but I think this feature might help us improving the workflow.
I have attached an screenshot from Logic Pro X :
http://imgur.com/a/yNjSe
Best,
Andrei