In my case it's more that I get car/airsick very easily -- So when I'm out and about, I won't be watching media on a portable screen. At most listening to music or an audio-book.

And if I'm in like. A hotel. Most of them (at least here in my country) have SmartTVs that will accept broadcasting from my phone. :P

As for note-taking, I can see the appeal but refer to my comment about typing in a Tablet being uniquely awful.