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.
See, I thought it might have been my tablets being cheap things.
But messing around with that borrowed iPad (possibly a Pro, the person who lent me it was filthy rich and likes premium stuff) made me go “… This is like, a high quality laptop but worse in every way?”
The screen was drop-dead gorgeous, and it was clearly a powerful (if locked down, cuz Apple) device – but it felt like everything I tried to do on the device was in some major way a compromise to accomodate for a less-than-ideal form factor.