Hmm horizontal is not a common pattern to browse. But, there is an intention state where if you hover for an extended duration beyond a typical gaze, it could recommend the reaction menu right over the note 🤔
Discussion
Extremely crude mockup of design idea incoming...

Yeah I got that from the previous note 🙌 Ty
This does feel like it would save time reading responses but I’m still hesitant on horizontal scrolling. There’s no frequent usage of horizontal scrolling current so may not feel intuitive.
But, could try and see how it feels regardless!
UI/UX is gonna have to be entirely rethought for these kind of devices...
The human field of vision would tend to make horizontal browsing more natural/comfortable I'd think...