The volume - weaponization levels of spew - makes a difference between an average Joe gullibly "charging" their phone in a microwave to the future of nations and their public being undermined.
I've found the deck magnification shortcut to be unhelpful when I've used it - often because the resolution of the text isn't high enough for it to look legible when blown up.
It's very, very useful for people to share videos instantly. For instance, someone takes a video at the end of a dance class and then sends it to the teacher for them to post online after. Or two people want to practice something so they record a small thing and send to the other person. It's seamless and really quick.
Android users end up having to wait for someone to upload to e.g. Dropbox and then share a link.
Personally, I detest achievements and wish I could easily turn it all off from steam entirely.