My only interaction with DisplayPort was this:

[bought a new monitor]
Oooh, this one has two HDMI inputs and a DisplayPort input. I'll probably just need the HDMI inputs, but whatever.

[got my late father's PC and decided to install Debian on it]
So wait, this doesn't do HDMI, it just has VGA output. The only VGA monitor I have at hand kinda sucks. Oh, wait, what the heck is that? Is that a DisplayPort? Where did I put the cable?

(Yeah, the PC works great, only problem is that it defaults to VGA output and will only switch to DP after several seconds, which means I never see the rad GRUB screen. So far, mostly used this PC to rip my CD collection to FLAC, because it has a DVD drive.)